Subj : Re: USB port issue -follo
To   : Barry Martin
From : Ky Moffet
Date : Sat Mar 07 2020 07:10:00

BARRY MARTIN wrote:
> Hi Ky!
> 
> Think this was originally in the other message but morphed into other
> areas.  Anyway, remember me typing about issues here with the system
> locking up sometimes when I plug a thumbdrive or rarely other USB device
> into the computer?  I think the problem isn't with the USB
> ports/circuits but more with the way the motherboard/something reacts to
> static electricity.
> 
> Had touched the side of the case (metal) and 'snap!' from the discharge
> and the system froze.  Happened several times.  Originally may have had
> a 'false positive' with the thumbdrive (USB port) as may not have noted
> the static electric spark as through the thumbdrive rather than my
> finger.

In ages past I was gifted an otherwise useful system that would randomly 
reboot when touched, or sometimes when someone merely walked past. There 
seemed no real pattern to it, as sometimes happened, sometimes didn't.

Eventually determined that there was a flaw in the case design -- the 
slightest vibration, if from the right direction, would cause the 
motherboard to touch metal and short out. Moved it to a different case, 
and it ran stable ever after. (It is still in The Closet, tho a P233 is 
no longer useful *sigh* but could not bring myself to discard a Tyan 
motherboard.)

Now I'm wondering if your USB connection has a short in there somewhere.

Or if maybe the internal ground is loose, perhaps on the USB connection 
to the mainboard.
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