{"id":248,"date":"2026-09-27T11:13:13","date_gmt":"2026-09-27T11:13:13","guid":{"rendered":"https:\/\/powertechguide.com\/?p=248"},"modified":"2026-10-19T12:29:32","modified_gmt":"2026-10-19T12:29:32","slug":"pcb-power-troubleshooting-step-by-step","status":"publish","type":"post","link":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/","title":{"rendered":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"248\" class=\"elementor elementor-248\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ebccccb e-flex e-con-boxed e-con e-parent\" data-id=\"2ebccccb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-601979fe elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"601979fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 class=\"wp-block-heading\">Introduction<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Many electronic problems appear to be software or communication issues.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Examples:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>MCU does not start<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Communication errors<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Random reset<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Sensor malfunction<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Flash programming failure<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Industrial controller stop<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Vision system error<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>However, in many cases, the root cause is:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p><strong>Power quality problem<\/strong><\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:paragraph --><\/p>\n<p>Before replacing ICs or changing software, engineers should first verify:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Input power<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Regulator output<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>VCC stability<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Ripple<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Ground<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Reset signal<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>This article explains a practical troubleshooting method used in real engineering projects.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 1. Define the Symptom<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Before measuring, clearly identify the problem.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:table --><\/p>\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Symptom<\/th>\n<th>Possible Cause<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>MCU not booting<\/td>\n<td>Reset issue<\/td>\n<\/tr>\n<tr>\n<td>Random reset<\/td>\n<td>VCC drop<\/td>\n<\/tr>\n<tr>\n<td>Communication failure<\/td>\n<td>Noise<\/td>\n<\/tr>\n<tr>\n<td>ADC error<\/td>\n<td>Ground noise<\/td>\n<\/tr>\n<tr>\n<td>Flash write failure<\/td>\n<td>Power instability<\/td>\n<\/tr>\n<tr>\n<td>Sensor malfunction<\/td>\n<td>Voltage drop<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p><!-- \/wp:table --><!-- wp:paragraph --><\/p>\n<p>Do not start by replacing parts.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Start by asking:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>&#8220;When does the problem happen?&#8221;<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:paragraph --><\/p>\n<p>Examples:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>During startup?<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>During motor operation?<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>During communication?<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>During high current?<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>During temperature changes?<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 2. Follow the Power Path<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Always trace the power flow.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u00a0 \u00a024V Input<br \/>\u00a0 \u00a0 \u00a0 \u2193<br \/>\u00a0 \u00a0Fuse<br \/>\u00a0 \u00a0 \u00a0 \u2193<br \/>\u00a0 \u00a0Protection Circuit<br \/>\u00a0 \u00a0 \u00a0 \u2193<br \/>\u00a0 \u00a0DC\/DC Converter<br \/>\u00a0 \u00a0 \u00a0\u2193<br \/>\u00a0 \u00a05V<br \/>\u00a0 \u00a0 \u00a0\u2193<br \/>\u00a0 \u00a0LDO<br \/>\u00a0 \u00a0 \u00a0\u2193<br \/>\u00a0 \u00a03.3V<br \/>\u00a0 \u00a0 \u00a0\u2193<br \/>\u00a0 \u00a0MCU<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Measure every point.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:table --><\/p>\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Point<\/th>\n<th>Voltage<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Input<\/td>\n<td>24.2V<\/td>\n<\/tr>\n<tr>\n<td>DC\/DC Output<\/td>\n<td>5.05V<\/td>\n<\/tr>\n<tr>\n<td>LDO Output<\/td>\n<td>3.30V<\/td>\n<\/tr>\n<tr>\n<td>MCU Pin<\/td>\n<td>3.15V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p><!-- \/wp:table --><!-- wp:paragraph --><\/p>\n<p>Problem:<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a03.30V\u22123.15V=0.15V3.30V &#8211; 3.15V = 0.15V<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>You found:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>Voltage drop.<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 3. Measure During Real Operation<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Many systems work correctly at idle.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Problems occur during:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Motor start<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Relay ON<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Communication<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Vision processing<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>High CPU load<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Flash programming<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:table --><\/p>\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Condition<\/th>\n<th>VCC<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Idle<\/td>\n<td>3.30V<\/td>\n<\/tr>\n<tr>\n<td>Communication<\/td>\n<td>3.25V<\/td>\n<\/tr>\n<tr>\n<td>Peak Load<\/td>\n<td>3.05V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p><!-- \/wp:table --><!-- wp:paragraph --><\/p>\n<p>If MCU minimum voltage:VMIN=3.0VV_{MIN}=3.0V<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>This is dangerous.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 4. Use an Oscilloscope<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Multimeter:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>  3.30V<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>Oscilloscope:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>  3.30V\n    ~~~~~~~<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>Possible findings:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading {\"level\":3} --><\/p>\n<p class=\"wp-block-heading\">\u00a0 \u00a0Ripple<\/p>\n<p><!-- \/wp:heading --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>     ~~~~~~~~~~<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:heading {\"level\":3} --><\/p>\n<p class=\"wp-block-heading\">\u00a0 \u00a0Spike<\/p>\n<p><!-- \/wp:heading --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>     -----|\n          |\n          |----<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:heading {\"level\":3} --><\/p>\n<p class=\"wp-block-heading\">\u00a0 \u00a0Voltage Sag<\/p>\n<p><!-- \/wp:heading --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>     ------\n           \\____<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:heading {\"level\":3} --><\/p>\n<p class=\"wp-block-heading\">\u00a0 \u00a0Ringing<\/p>\n<p><!-- \/wp:heading --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>     ---\/\\\/\\\/\\---<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>Oscilloscope measurements reveal problems invisible to multimeters.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 5. Check Reset Signal<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>A stable reset is critical.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u00a0 \u00a0Power ON<br \/>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u2193<br \/>\u00a0 \u00a0Reset Low<br \/>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u2193<br \/>\u00a0 \u00a0VCC Stable<br \/>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u2193<br \/>\u00a0 \u00a0Reset Release<br \/>\u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\u00a0 \u00a0MCU Start<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Bad case:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u00a0 \u00a0Power ON<br \/>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\u00a0 \u00a0VCC unstable<br \/>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\u00a0 \u00a0Reset unstable<br \/>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2193<br \/>\u00a0 \u00a0Boot failure<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Real-World Engineering Experience<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>During development of a controller board, startup problems occurred occasionally.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Measurements found:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Power instability<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Unstable reset timing<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Undefined boot signal state<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>Solutions:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2714 Reset circuit modification<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2714 Pull-up resistor addition<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2714 Boot signal improvement<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Result:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>Stable startup.<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 6. Check Ground<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Many engineers measure only VCC.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Ground is equally important.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>   MCU\n    \u2502\n    \u2502\n   GND\n    \u2502\n    \u2502\n   Connector<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>High current:\u00a0<\/p>\n<p>\u00a0 \u00a0 V = IR<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Even ground can move.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>This creates:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Communication errors<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>ADC errors<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Noise<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Reset problems<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>Always check:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>Local Ground<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:paragraph --><\/p>\n<p>Not only:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>System Ground<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 7. Check Decoupling Capacitors<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Incorrect:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>   MCU ---------------- 100nF<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>Better:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>   MCU --100nF<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>Checklist:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2714 Correct value<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2714 Close placement<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2714 Short ground<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2714 Good vias<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 8. Compare Good vs Bad Board<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>This is a powerful method.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:table --><\/p>\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Good<\/th>\n<th>Bad<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>VCC<\/td>\n<td>3.30V<\/td>\n<td>3.10V<\/td>\n<\/tr>\n<tr>\n<td>Ripple<\/td>\n<td>20mV<\/td>\n<td>100mV<\/td>\n<\/tr>\n<tr>\n<td>Reset<\/td>\n<td>Stable<\/td>\n<td>Unstable<\/td>\n<\/tr>\n<tr>\n<td>Startup<\/td>\n<td>OK<\/td>\n<td>Failure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p><!-- \/wp:table --><!-- wp:paragraph --><\/p>\n<p>Differences often reveal the problem quickly.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 9. Use Thermal Inspection<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Heat often indicates problems.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Check:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Regulators<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>MOSFETs<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Connectors<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Power ICs<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>Example:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>   Normal:40\u00b0C\n\n   Abnormal:85\u00b0C<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>Possible causes:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Overload<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Short circuit<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Bad solder<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Poor cooling<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>Thermal cameras can help.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Step 10. Troubleshooting Flow<\/h2>\n<p><!-- \/wp:heading --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>   Problem\n      \u2193\n   Define Symptom\n      \u2193\n   Check Input Power\n      \u2193\n   Measure VCC\n      \u2193\n   Check Ripple\n      \u2193\n   Check Reset\n      \u2193\n   Check Ground\n      \u2193\n   Check Capacitors\n      \u2193\n   Check Load\n      \u2193\n   Compare Good Board\n      \u2193\n   Find Root Cause<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Industrial Example<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Example system:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>   UPS\n    \u2193\n   24V\n    \u2193\n   Power Supply\n    \u2193\n   PLC\n    \u2193\n   Industrial PC\n    \u2193\n   Network\n    \u2193\n   Vision System<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>Problem:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Vision system stops randomly.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Investigation:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2713 Input power OK<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2713 Network OK<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>\u2713 Software OK<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Found:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Ripple increased<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>UPS battery degraded<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Power quality poor<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>After replacing UPS battery:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>System became stable.<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:paragraph --><\/p>\n<p>This shows:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>Good power quality improves system reliability.<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Common Mistakes<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p><img decoding=\"async\" class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg\" alt=\"\u274c\" \/> Replacing ICs without measurement<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><img decoding=\"async\" class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg\" alt=\"\u274c\" \/> Ignoring ground<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><img decoding=\"async\" class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg\" alt=\"\u274c\" \/> Measuring only idle condition<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><img decoding=\"async\" class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg\" alt=\"\u274c\" \/> Long oscilloscope ground wire<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><img decoding=\"async\" class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg\" alt=\"\u274c\" \/> Ignoring reset circuit<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><img decoding=\"async\" class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg\" alt=\"\u274c\" \/> Ignoring connector resistance<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><img decoding=\"async\" class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg\" alt=\"\u274c\" \/> Ignoring temperature effects<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Engineering Troubleshooting Rule<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Good engineers do not start with:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>&#8220;Which component is broken?&#8221;<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:paragraph --><\/p>\n<p>They start with:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:quote --><\/p>\n<blockquote class=\"wp-block-quote\">\n<p><!-- wp:paragraph --><\/p>\n<p>&#8220;What changed?&#8221;<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/blockquote>\n<p><!-- \/wp:quote --><!-- wp:paragraph --><\/p>\n<p>Then measure:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Voltage<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Current<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Temperature<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Signal<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Timing<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>This approach saves time and reduces unnecessary component replacement.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:heading --><\/p>\n<h2 class=\"wp-block-heading\">Final Thoughts<\/h2>\n<p><!-- \/wp:heading --><!-- wp:paragraph --><\/p>\n<p>Most intermittent PCB problems are related to:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Power<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Ground<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Reset<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Noise<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Timing<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p>A practical engineering approach is:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:code --><\/p>\n<pre class=\"wp-block-code\"><code>   Measure\n      \u2193\n   Observe\n      \u2193\n   Analyze\n      \u2193\n   Verify\n      \u2193\n     Fix<\/code><\/pre>\n<p><!-- \/wp:code --><!-- wp:paragraph --><\/p>\n<p>This troubleshooting method is useful for:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Industrial controllers<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>PLC systems<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Communication equipment<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Vision systems<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Automotive electronics<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Medical devices<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><!-- wp:list-item --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Embedded systems<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p>\u00a0<\/p>\n<p><!-- \/wp:list --><!-- wp:separator --><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><!-- \/wp:separator --><!-- wp:list --><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><!-- wp:list-item --><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/powertechguide.com\/best-oscilloscopes-for-electronics-engineers\/\">Best Oscilloscopes for Electronics Engineers: Personal Use vs. Professional Lab Equipment &#8211; PowerTechGuide<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><!-- \/wp:list-item --><\/p>\n<p><!-- \/wp:list --><!-- wp:paragraph --><\/p>\n<p><!-- \/wp:paragraph --><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Introduction Many electronic problems appear to be software or communication issues. Examples: \u00a0 MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: \u00a0 Input [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"page_builder":"","footnotes":""},"categories":[6,106],"tags":[58,77,59,78,79,22],"class_list":["post-248","post","type-post","status-publish","format-standard","hentry","category-electronics","category-read","tag-oscilloscope","tag-pcb-troubleshooting","tag-power-integrity","tag-reset-circuit","tag-ripple","tag-voltage-drop"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \u2013\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"John Huh\"\/>\n\t<meta name=\"keywords\" content=\"oscilloscope,pcb troubleshooting,power integrity,reset circuit,ripple,voltage drop,electronics,read\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"PowerTechGuide \u2013\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \u2013 PowerTechGuide\" \/>\n\t\t<meta property=\"og:description\" content=\"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \u2013\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/powertechguide.com\/wp-content\/uploads\/2026\/10\/logo-powertechguide-1.webp\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/powertechguide.com\/wp-content\/uploads\/2026\/10\/logo-powertechguide-1.webp\" \/>\n\t\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t\t<meta property=\"og:image:height\" content=\"960\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-09-27T11:13:13+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-10-19T12:29:32+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/facebook.com\/powertechguide.com\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:site\" content=\"@powertechguide.com\" \/>\n\t\t<meta name=\"twitter:title\" content=\"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \u2013 PowerTechGuide\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \u2013\" \/>\n\t\t<meta name=\"twitter:creator\" content=\"@powertechguide.com\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/powertechguide.com\/wp-content\/uploads\/2026\/10\/logo-powertechguide-1.webp\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#blogposting\",\"name\":\"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \\u2013 PowerTechGuide\",\"headline\":\"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method\",\"author\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/author\\\/john-huh\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/s.w.org\\\/images\\\/core\\\/emoji\\\/17.0.2\\\/svg\\\/274c.svg\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#articleImage\"},\"datePublished\":\"2026-09-27T11:13:13+00:00\",\"dateModified\":\"2026-10-19T12:29:32+00:00\",\"inLanguage\":\"en-US\",\"commentCount\":2,\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#webpage\"},\"articleSection\":\"Electronics, read, Oscilloscope, PCB Troubleshooting, Power Integrity, Reset Circuit, Ripple, Voltage Drop\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/#listItem\",\"position\":1,\"name\":\"PowerTechGuide | Practical Electronics Engineering Guides\",\"item\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/category\\\/electronics\\\/#listItem\",\"name\":\"Electronics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/category\\\/electronics\\\/#listItem\",\"position\":2,\"name\":\"Electronics\",\"item\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/category\\\/electronics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#listItem\",\"name\":\"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/#listItem\",\"name\":\"PowerTechGuide | Practical Electronics Engineering Guides\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#listItem\",\"position\":3,\"name\":\"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/category\\\/electronics\\\/#listItem\",\"name\":\"Electronics\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/#organization\",\"name\":\"PowerTechGuide\",\"description\":\"Practical electronics engineering guides: PCB power design, grounding and EMI, embedded systems, and test equipment \\u2014 written from real hardware experience.\",\"url\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/\",\"email\":\"contact@powertechguide.com\",\"telephone\":\"+16788580163\",\"foundingDate\":\"2026-10-01\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"value\":4},\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/powertechguide.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/logo-powertechguide.jpg\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#organizationLogo\"},\"image\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#organizationLogo\"},\"sameAs\":[\"https:\\\/\\\/facebook.com\\\/powertechguide.com\",\"https:\\\/\\\/x.com\\\/powertechguide.com\",\"https:\\\/\\\/instagram.com\\\/powertechguide.com\",\"https:\\\/\\\/tiktok.com\\\/@powertechguide.com\",\"https:\\\/\\\/pinterest.com\\\/powertechguide.com\",\"https:\\\/\\\/youtube.com\\\/powertechguide.com\",\"https:\\\/\\\/linkedin.com\\\/in\\\/powertechguide.com\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/author\\\/john-huh\\\/#author\",\"url\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/author\\\/john-huh\\\/\",\"name\":\"John Huh\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#authorImage\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6a3d74f64168a4ba2fe348e1c7a365923d67b5825bb80149586234aa7297125a?s=96&d=mm&r=g\",\"width\":96,\"height\":96,\"caption\":\"John Huh\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#webpage\",\"url\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/\",\"name\":\"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \\u2013 PowerTechGuide\",\"description\":\"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \\u2013\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/pcb-power-troubleshooting-step-by-step\\\/#breadcrumblist\"},\"author\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/author\\\/john-huh\\\/#author\"},\"creator\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/author\\\/john-huh\\\/#author\"},\"datePublished\":\"2026-09-27T11:13:13+00:00\",\"dateModified\":\"2026-10-19T12:29:32+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/\",\"name\":\"PowerTechGuide | Practical Electronics Engineering Guides\",\"alternateName\":\"PowerTechGuide\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/powertechguide.com\\\/en\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \u2013 PowerTechGuide","description":"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \u2013","canonical_url":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/","robots":"max-image-preview:large","keywords":"oscilloscope,pcb troubleshooting,power integrity,reset circuit,ripple,voltage drop,electronics,read","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BlogPosting","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#blogposting","name":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \u2013 PowerTechGuide","headline":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method","author":{"@id":"https:\/\/powertechguide.com\/en\/author\/john-huh\/#author"},"publisher":{"@id":"https:\/\/powertechguide.com\/en\/#organization"},"image":{"@type":"ImageObject","url":"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/274c.svg","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#articleImage"},"datePublished":"2026-09-27T11:13:13+00:00","dateModified":"2026-10-19T12:29:32+00:00","inLanguage":"en-US","commentCount":2,"mainEntityOfPage":{"@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#webpage"},"isPartOf":{"@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#webpage"},"articleSection":"Electronics, read, Oscilloscope, PCB Troubleshooting, Power Integrity, Reset Circuit, Ripple, Voltage Drop"},{"@type":"BreadcrumbList","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/powertechguide.com\/en\/#listItem","position":1,"name":"PowerTechGuide | Practical Electronics Engineering Guides","item":"https:\/\/powertechguide.com\/en\/","nextItem":{"@type":"ListItem","@id":"https:\/\/powertechguide.com\/en\/category\/electronics\/#listItem","name":"Electronics"}},{"@type":"ListItem","@id":"https:\/\/powertechguide.com\/en\/category\/electronics\/#listItem","position":2,"name":"Electronics","item":"https:\/\/powertechguide.com\/en\/category\/electronics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#listItem","name":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method"},"previousItem":{"@type":"ListItem","@id":"https:\/\/powertechguide.com\/en\/#listItem","name":"PowerTechGuide | Practical Electronics Engineering Guides"}},{"@type":"ListItem","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#listItem","position":3,"name":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method","previousItem":{"@type":"ListItem","@id":"https:\/\/powertechguide.com\/en\/category\/electronics\/#listItem","name":"Electronics"}}]},{"@type":"Organization","@id":"https:\/\/powertechguide.com\/en\/#organization","name":"PowerTechGuide","description":"Practical electronics engineering guides: PCB power design, grounding and EMI, embedded systems, and test equipment \u2014 written from real hardware experience.","url":"https:\/\/powertechguide.com\/en\/","email":"contact@powertechguide.com","telephone":"+16788580163","foundingDate":"2026-10-01","numberOfEmployees":{"@type":"QuantitativeValue","value":4},"logo":{"@type":"ImageObject","url":"https:\/\/powertechguide.com\/wp-content\/uploads\/2026\/10\/logo-powertechguide.jpg","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#organizationLogo"},"image":{"@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#organizationLogo"},"sameAs":["https:\/\/facebook.com\/powertechguide.com","https:\/\/x.com\/powertechguide.com","https:\/\/instagram.com\/powertechguide.com","https:\/\/tiktok.com\/@powertechguide.com","https:\/\/pinterest.com\/powertechguide.com","https:\/\/youtube.com\/powertechguide.com","https:\/\/linkedin.com\/in\/powertechguide.com"]},{"@type":"Person","@id":"https:\/\/powertechguide.com\/en\/author\/john-huh\/#author","url":"https:\/\/powertechguide.com\/en\/author\/john-huh\/","name":"John Huh","image":{"@type":"ImageObject","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#authorImage","url":"https:\/\/secure.gravatar.com\/avatar\/6a3d74f64168a4ba2fe348e1c7a365923d67b5825bb80149586234aa7297125a?s=96&d=mm&r=g","width":96,"height":96,"caption":"John Huh"}},{"@type":"WebPage","@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#webpage","url":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/","name":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \u2013 PowerTechGuide","description":"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \u2013","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/powertechguide.com\/en\/#website"},"breadcrumb":{"@id":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/#breadcrumblist"},"author":{"@id":"https:\/\/powertechguide.com\/en\/author\/john-huh\/#author"},"creator":{"@id":"https:\/\/powertechguide.com\/en\/author\/john-huh\/#author"},"datePublished":"2026-09-27T11:13:13+00:00","dateModified":"2026-10-19T12:29:32+00:00"},{"@type":"WebSite","@id":"https:\/\/powertechguide.com\/en\/#website","url":"https:\/\/powertechguide.com\/en\/","name":"PowerTechGuide | Practical Electronics Engineering Guides","alternateName":"PowerTechGuide","inLanguage":"en-US","publisher":{"@id":"https:\/\/powertechguide.com\/en\/#organization"}}]},"og:locale":"en_US","og:site_name":"PowerTechGuide \u2013","og:type":"article","og:title":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \u2013 PowerTechGuide","og:description":"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \u2013","og:url":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/","og:image":"https:\/\/powertechguide.com\/wp-content\/uploads\/2026\/10\/logo-powertechguide-1.webp","og:image:secure_url":"https:\/\/powertechguide.com\/wp-content\/uploads\/2026\/10\/logo-powertechguide-1.webp","og:image:width":1920,"og:image:height":960,"article:published_time":"2026-09-27T11:13:13+00:00","article:modified_time":"2026-10-19T12:29:32+00:00","article:publisher":"https:\/\/facebook.com\/powertechguide.com","twitter:card":"summary_large_image","twitter:site":"@powertechguide.com","twitter:title":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method \u2013 PowerTechGuide","twitter:description":"Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input Introduction Many electronic problems appear to be software or communication issues. Examples: MCU does not start Communication errors Random reset Sensor malfunction Flash programming failure Industrial controller stop Vision system error However, in many cases, the root cause is: Power quality problem Before replacing ICs or changing software, engineers should first verify: Input \u2013","twitter:creator":"@powertechguide.com","twitter:image":"https:\/\/powertechguide.com\/wp-content\/uploads\/2026\/10\/logo-powertechguide-1.webp"},"aioseo_meta_data":{"post_id":"248","title":null,"description":null,"keywords":null,"keyphrases":{"focus":{"keyphrase":"","score":0,"analysis":{"keyphraseInTitle":{"score":0,"maxScore":9,"error":1}}},"additional":[]},"focus_keyword":null,"additional_keywords":null,"truseo_locale":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_custom_url":null,"og_image_custom_fields":null,"og_image_url":null,"og_image_width":null,"og_image_height":null,"og_video":"","og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_image_url":null,"twitter_title":null,"twitter_description":null,"schema_type":"default","schema_type_options":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"BlogPosting","isEnabled":true},"graphs":[]},"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","local_seo":null,"limit_modified_date":false,"ai":{"faqs":[],"keyPoints":[],"schemas":[],"titles":[],"descriptions":[],"socialPosts":{"email":{"subject":"","preview":"","content":""},"linkedin":[],"twitter":[],"facebook":[],"instagram":[]}},"breadcrumb_settings":null,"seo_analyzer_scan_date":null,"created":"2026-09-27 21:39:57","updated":"2026-10-19 13:22:54"},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/powertechguide.com\/en\/\" title=\"PowerTechGuide | Practical Electronics Engineering Guides\">PowerTechGuide | Practical Electronics Engineering Guides<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">|<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/powertechguide.com\/en\/category\/electronics\/\" title=\"Electronics\">Electronics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">|<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tHow to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"PowerTechGuide | Practical Electronics Engineering Guides","link":"https:\/\/powertechguide.com\/en\/"},{"label":"Electronics","link":"https:\/\/powertechguide.com\/en\/category\/electronics\/"},{"label":"How to Troubleshoot PCB Power Problems: A Step-by-Step Engineering Method","link":"https:\/\/powertechguide.com\/en\/pcb-power-troubleshooting-step-by-step\/"}],"_links":{"self":[{"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/posts\/248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/comments?post=248"}],"version-history":[{"count":15,"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/posts\/248\/revisions"}],"predecessor-version":[{"id":1787,"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/posts\/248\/revisions\/1787"}],"wp:attachment":[{"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/media?parent=248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/categories?post=248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/powertechguide.com\/en\/wp-json\/wp\/v2\/tags?post=248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}