USB port issue in new laptop: Mouse not working but thumb drive can R/W

MS_User · Aug 2, 2022

i dont understand you said you just purchase this laptop new....i would have return it and ask them to send me another one.....now you open it up and you lost your factory warranty not a smart move

blackranger · Aug 2, 2022

acer-5100 said: ↑

Well that prove that my guess was right.

But, I can assure (I worked for 15 years as electronic tecnician, before moving to IT) that those kind of problems were the worst to bisect, even before the tiny surface mounted components were a thing, and the crappy leadless solder was (forcefully) introduced. (tin/lead based solder may be an environmental problem and also an healt problem for people working in factories doing soldering 8h a day, but it was way better for electronics itself).

In short your problem can be a simple screening metal that touch a data line (and that should be relatively easy to spot/fix), but can be also a "cold" (poor) solder point somhere on the PCB, in the worst case can be a poor solder point below some BGA ICs which would require a relatively costly equipment (and a very skilled technician) to desolder the whole IC, and resolder it in place correctly (search on youtube for "BGA reballing" to understand better what I'm talking about).

In short if it's a temporary short circuit you should be able to fix it yourself, possibly a tiny piece of adhesive tape can be enough, but if the problem is a solder I don't suggest to fix it unless you're prepared to spend a good amount of money just to fix a minor problem. Keep the workaround you found yourself and live long and prosper.
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Thanks a lot, it is really informative and helpful.
So it implies that this can be a design problem in the internals?

Hadron-Curious · Aug 5, 2022

Probably a port connector issue. Shaking the head of the mouse in the port might reveal something.

USB port issue in new laptop: Mouse not working but thumb drive can R/W

MS_User MDL Guru

blackranger MDL Senior Member

Hadron-Curious MDL Guru