Hi everyone. My PC won't boot just yesterday.

I've got an MSI K9N Neo motherboard.

The problem started when I plugged in a flash disk upside down because the upper barrier of the usb is broken out in my pc for some reason and then the pc hanged.

I can't turn it off nor reset.

After that, I just took the power cord out of the socket and put it in again, when I put it in again and turned on the pc, it doesn't post, but the videocard, processor and system fans are working fine.

The DVD drive doesn't flash, but the keyboard lock buttons flash when I turn it on and then they turn off again.

I can't turn it off nor reset by standard procedures, so I need to take it off the socket if I want to turn it off.

I already tried:
Taking the battery off the PC for 15 seconds.
Taking the USB connectors off the mobo.
Reseating the video card
Transferring the RAM to another slot(there are 5, i put it from slot 1 to slot 5), then back again, then tried to boot without RAM.

What could be wrong?

Mobo is fried.

It's not the first time that broken USB jack fried mobo.

d'oh?

thanks for the reply btw. but how could i know for sure? mobos are expensive stuff. got a good replacement suggestion for a better mobo variant than the msi k9n neo?

i sure hope the cpu didn't get fried too.

Yeah the motherboard is probably fried. PC repair shop sounds like the best bet.

I agree with jbennet.

If you want to be sure that the CPU isn't fried, the only way is to put it in another mobo (if available) and see if it works.

(Doh??)

risky option: up to you:

take the heatsinc off the cpu, turn pc on for 5 seconds, (no more or fry cpu) and if cpu hot then ok if cold then probably fries with your motherboard, but still don't rite cpu off until fully tested.

NO NO NO NO NO NO NO

DONT DO THAT

It will still get hot regardless of whetheri its functioning or not

Hi everyone!

Got it to shop and it seems the mobo did get fried, and the power supply was also damaged.

Too much damage from just a single flash disk.

Anyway, can you tell me where this happened before?

Anyway, wish they made better usbs. Devices should be made to account to ignorance/user error you know. Putting them upside down is kind of common.

To hotmatrixx: very bad advice, i don't want to risk damaging my cpu too.

I fried my usb print server plugging in a printer upside down when the tab fell out but never a whole pcv motherboard. I have a laptop with the same problem, but that just powers off or crashes.

that's cool. i did put the RISKY warning up first.. have you ever tried plugging a USB in in the dark? the amount of arcing you can get is kinda scary. and it explains how it will fry something so bad. especially if it is from a powered device like a print server or an ext HDD.