How can a usb device crash a computer? solved

[joe at actionline.com]

Thanks Brian.  What you suggested worked.
After waiting for several minutes, it did start fine. Whew.

Brian wrote:
> Sounds like your adapter is wired wrong.  Hopfully you can hit the
> company up for any repairs to your computer that might be necessary.
>
> That being said, Many computer power supplies have an internal breaker
> of sorts that you might have just tripped.  You just need to have the
> power supply bleed off ALL the power inside of it.  Just unplug the
> power cord for 10 minutes or so and see if that will allow the computer
> to come back on.  Don't try to skimp on the time, it can take a long
> time to bleed off everything and it won't work unless it has.
>
> Hopefully that is all that has happened and it didn't just fry your
> motherboard.
>
> Brian Cluff
>
> On 08/07/2012 01:59 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?