hardware Component Level Motherboard faultTracing

 

1) How to diagnose the exact component failure on the faulty motherboard?
Obviously, a burn mark is a dead give away sign, but what to do if there are no visual signs? Do you poke around with a multimeter? With what voltage settings and how do you know what to look for ? For the same you need to know the power sequence of the motherboard, it will help you to find out the missing voltage on the motherboard.

2) Is it usually a bad capacitor or its a circuit shorting ?
Bad capacitor seems to think so when it usually beeps with ground . Typically each and every capacitor in laptop motherboard is for filtering or coupling purpose, but if it seems to be giving beep sound with the ground we need to check the sequence of that particular section to find out the root cause as most of the times its because of bad connection/ circuit shorting.

3) How to perform the component level repair?
So you’ve found the bad capacitor or component on the motherboard, so now you need to solder a new one without tampering  the components around them . Always use good tools for soldering purpose to avoid issues.