Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > General Electronics Technical Discussion
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 11-22-2021, 03:46 PM   #1
TheAnswer305
New Member
 
Join Date: Aug 2021
City & State: Miami, FL
My Country: USA
I'm a: Knowledge Seeker
Posts: 16
Default Short theory

Hi guys, so i am in the process of repairing a couple motherboards and ive come across something that im not quite understanding. Maybe you guys can help me out.

So i am checking the motherboard and find i have several areas of caps that have a short to ground, being that both sides give continuity when testing against a ground pad. Now i know this might be okay for some caps but this is a lot of caps doing this so im thinking theres a short. So i injected a small amount of voltage on a larger cap. I sent it in at 3v 1a to be safe and low, i saw some mosfets get hot and the bench shows it pulling 1.1v @ .8 amps. They also light up on the flir so i pulled them off. Now the delivery goes to 3v @ .03 amps so im thinking the short is gone becuase the voltage is flowing and only consuming whatever items are on the line take, however, i still get short to ground on the caps.

Am i understanding that when the voltage doesnt get dropped it means there is no short, or is it that there isnt a BIG enough short to cause heat.

In this scenario, how do you locate it?

Last edited by TheAnswer305; 11-22-2021 at 04:23 PM..
TheAnswer305 is offline   Reply With Quote
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums © 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 03:40 AM.
Did you find this forum helpful?