Subj : Re: USB port issue -follo
To   : Barry Martin
From : Ky Moffet
Date : Mon May 04 2020 17:59:00

BARRY MARTIN wrote:
> Hi Ky!
> 
>   KM> Might be nothing you can see, unfortunately. Broken spot in a
>   KM> trace, loose wire up inside a port... who knows....
> 
> Right: plus bad solder joint - could be literally anything anywhere.
> Opening the case to look for anything obvious is probably as far as I'd
> go: not going to look at the board with a magnifying glass - probably
> one the sandwiched type and the problem is in a middle layer!

With the Asus P5B-Deluxe board (like mine where USB quit and voltage 
measured by the board was low) ... turns out it's a design problem with 
the southbridge wiring. Evidently it slowly cooks the relevant 
capacitors, and eventually, USB fails, tho the rest of the board keeps 
working.
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