if you go through all these steps snd still have problems, check the mother board for solder bridges.

Apr 13, 2018
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or better yet check before your build some companies do not care if the solder runs together, that makes a short where the solder runs into another component.
 
MERGED QUESTION
Question from debraanderson1953 : "building computer problems"



Ive built a hundred or more PCs in my time and ive never seen any kind of solder issues from manufactured items. That may be true with really cheap parts, but I have no idea cause I dont use really cheap parts when building PCs, ever. Not insinuating that you do, but I would imagine that may be a reason for crappy soldering.
 

Kolvir

Honorable
Aug 29, 2015
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I've got what looks like a solder bridge on my new MB. I think it is for the USB 3 connectors. I'm wondering if this could have caused the arc and burn I had posted about a few days ago. Burned out a monitor too.


Do you think it is a valid bridge?

solder.JPG