Disgrazia USB + Tastiera

[StefanoTarkus]

Salve a tutti.

L'altra sera ho connesso a caldo un lettore di schedine per fotocmaera digitale alla porta USB del mio vecchio PC AMD K6 500 su Motherboard SOYO 5EHM e come per magia, si e' rotto tutto.
La tastiera non va piu' e neanche il mouse. Dopo mille prove, ho trovato sui gruppi di Google il seguente messaggio disperato...

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Bought a tablet, bought a USB cable, but sadly I attatched the cable
backwards. The machine now makes a continuous rapid beeping, and
complains of keyboard failure. I'm not proud of myself.

The keyboard checks out okay on another machine. If the 577 is booted
without keyboard then there is no beeping.

Checked the fuse for continuity. Oddly, it only kicked the needle over
about 80%. I would have expected 100% or nothing. Other board fuses
show 100%. So I bridged it anyway to run a test. No joy; still get the
beeps and keyboard failure.

I'm guessing the power surge from screwing up the USB damaged the fuse
and something beyond. Do the USB and keyboard have a common UART or
some such?

Help is appreciated as it turns out used PI AT boards are now rare in
this town. I'd have to buy new for $100, not the $25 I expected, and
at that point it's really time to put the money into a whole new
system. But I just hate seeing all those old parts go to waste, you
know?
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Ora io mi domando:
Possibile che succedano queste cose ?
Dove lo trovo il fusibile sulla MB SOYO ? Sempre se c'e' !
Ma la specifica USB dice che si puo' inserire e disinserire a caldo qualsiasi cosa.
Avete avuto di questi problemi ? Sapete dove cercare su internet altre informazioni ?

Saluti a tutti.
Stefano.