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Old March 19, 2009, 06:58 PM
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Default USB Blew up my comp?

Haha I am at a loss here. Moved my whole computer over to a different case tonight.

It booted no problem; then I was checking to see if my front panel usb ports worked...

they didn't seem to for some reason... even though I know it was plugged in correctly (it's easy right?) haha


then after a few second of plugging a pair of usb headphones into the front panel the machine shuts off and will not even post now; the display just flickers and nothing happens.. I can hear the HDD spin up almost as though it starts to boot... but I'm not getting any post error sounds at all.


Ideas?

I don't really have any hardware i can swap with for this system right now...

I have tried different psu's and no go...
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Old March 19, 2009, 07:03 PM
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My guess is you reset cmos already? Fact that it booted and then shut down on you is not good...
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Old March 19, 2009, 07:04 PM
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I had almost the same thing happen to an old athlon XP 2400 system I had, I never managed to fix it =( Ive had similar problems with USB devices on boot up before but once the usb device was unplugged it worked fine again right after. Try reseting your CMOS?
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Old March 19, 2009, 07:17 PM
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I've reset it a few times, no go. I just stuck the video card in an old asus p5nd2 sli i had laying around with an hdd etc and it wouldnt boot; but that mobo was on the fritz anyways and i'm not positive it worked at all... so i can't say for certain right now... it's looking like mobo
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Old March 19, 2009, 07:45 PM
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took everything out of the case; reseated the heatsink; stuck it on a box and tried booting it that way - with a dif psu - nothing, does the exact same thing.
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Old March 19, 2009, 08:08 PM
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I've managed to change out every part; except mobo and video card... grrrr same exact results with everything... could the mobo have fried?
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Old March 19, 2009, 08:12 PM
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Sorry to say it encorp, but the mobo is fried. It happened to one of my clients recently, an old P4P800-E 478 board. He blew it through the southbridge of all things by having - get this: 4x external hard drives on the rear panel and ANOTHER 4x external hard drives on a USB Pci controller card. Southbridge has a black char on it, badly fried. I'll take a picture tomorrow if you wanna see.... for now, goodnight and my condolences.
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Old March 19, 2009, 08:16 PM
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I just need a different mobo now so i can test and see what other hardware is shot.... bah

now that you mention it; I vaguely remember a slight burning smell right after it happened but it didn't last long at all.. thought maybe my nose was tricking me...


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Old March 19, 2009, 08:41 PM
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A usb header, even if one pin off to one side or another, can short out the southbridge = burning = dead mobo....
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Old March 19, 2009, 09:04 PM
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Quote:
Originally Posted by CMetaphor View Post
A usb header, even if one pin off to one side or another, can short out the southbridge = burning = dead mobo....

that is exactly what happened it seems....
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