please move: Power Supply Replacement

[J_Dubb]

I purchased an HP Pavilion a1310n just over a year ago. I have since upgraded the power supply, video card, sound card, and several other addons. Motherboard and CPU remain original.
During a particularly heavy rainstorm, I powered down my PC and unplugged it in case of a power surge. After the storm, I plugged in my PC only to have it immediately power on. The fans powered on, but the drives did not, and consequently, nothing ever appeared on screen- not even a BIOS screen. I cannot power down the PC without unplugging it or flipping the power switch on the back- holding the power button won't work.
I've tried removing the video card and connecting the monitor to the onboard video output to see if the video card was the culprit. It had the same result.

The only conclusion that I've been able to come to is that it may be a bad motherboard.
Can anyone suggest a replacement motherboard, or other possible causes for my problem?

For the motherboard, I need it to be able to support:
AMD64 CPU (socket 939)
a PCI-E video card (ATI Radeon X800 XL)
1 ATA and 1 SATA HDDs
2 optical drives
4 (512mb) RAM sticks

 

[sirrobin4ever]

Uh oh....

Did you have any ethernet/phone lines going into the computer? Did you also unplug the speakers/monitor from the wall? I've heard of this happening way too many times.

How big is the motherboard? Do you need ATX or MicroATX? (If you don't know, tell me how many PCI/PCIe slots are on the motherboard.)

Best of Luck

 

[J_Dubb]

well i just replaced the upgraded PSU with the original (after removing all upgraded parts), and it booted just fine. after re-replacing it (putting the better one back in) to see if i could get it to work, the power supply gave a very high pitched noise and didn't even power the fans.

can someone move this thread to Power Supplies, PC Cases & Case Mods ?

 

[sirrobin4ever]

Hmm. Must have gotten a bad PSU. You should definitely RMA it pronto.

Best of Luck

 

[J_Dubb]

thanks so much. already filled out an RMA request. hopefully i'll get this problem worked out soon!