Computer won't completely shut off

[dchilder]

Just put together a new box with the following:

Athlon X2 4200
Asus A8N32-SLI Deluxe (with new BIOS to address issues with 7900 GT)
EVGA Geforce 7900 GT (latest drivers)
ATI HDTV Wonder (latest drivers)
Windows XP SP2

I did a clean install on one hard drive, and now when I try to turn the computer off, Windows shuts down, but the power stays on (i.e., fans stay running - no video signal goes out to the monitor).

I've got my old hard drive in there as well. I didn't update the drivers or anything on it, but when I boot from that hard drive, when I try to shut down the computer, everything shuts down completely.

So... I know that I've got some software issues somewhere. I've installed so much software, I'm not sure where the problem lies. I was having some blue screens of death, I think associated with the 7900 GT until I updated the BIOS recently. Unfortunately, I can't peg the problem starting after any particular install.

Any ideas to fix, or ideas on how to diagnose other than doing another clean install and adding things one at a time again?

Thanks!

 

[highoctane2244]

Try changing your power supply.

 

[dchilder]

Thanks for the reply.

I've got a brand new power supply - Antec Phantom 500. I don't think that is the problem, because when I switch to the other bootable hard drive I don't have the problem. I think it is more likely to be a software/driver/Windows XP deal, and am hoping that someone else has had a similar situation and was able to resolve it.

Any other ideas?

Thanks,

David