How can a usb device crash a computer?

[Stephen]

worst case the voltage pins were backwards in either the port or the
cable. best case the data lines and the os then freaked out.

but if the thing is not coming back up it sounds like voltage lines
were crossed or crossed with the data lines.

On Tue, Aug 7, 2012 at 1:59 PM,  <joe at actionline.com> wrote:
>
> How could plugging in a printer via a usb port crash my computer?
>
> I just got a usb to rs232 connector cable and when I plugged it
> in to my computer, the computer instantly quit. So I unplugged
> the usb cable immediately, but now I cannot power on the computer.
>
> What in the world could have caused such a drastic failure?
>
> And what can I try to resurrect the computer?
>
> Or, to whom would you recommend I take the computer for repair?
>
>
>
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-- 
A mouse trap, placed on top of your alarm clock, will prevent you from
rolling over and going back to sleep after you hit the snooze button.

Stephen