So my son's computer uses a Gigabyte K8NS Pro with an AMD 3200+ single core and 2GB RAM. Lately I've done a few things and it's become unstable.
First off, it was having trouble rebooting - I think the two BIOSes had gotten out of sync, and one would not boot. So I flashed the latest BIOS on, successfully, using the Gigabyte tool to do it.
I also got rid of some unused programs. The only one that was not a game was the Creative Media Center.
I changed WoW resolution from 1024 to 1280.
Last, I gently vacuumed a lot of dust out of the system.
So since these things were done, the system has begun to shut down spontaneously under load (and once when nothing much was going on, although there may have been a virus scan running.) It will either lock up with colored bars on the screen, or go blank with a clicking sound coming from the speakers, or suddenly report "no signal" on the screen. This usually happens playing a graphically demanding video game, but twice it's been just idle or browsing the web.
Also, the DVD drive is seen at boot time, detects accurately in the CMOS setup screen, it's driver loads correctly as reported by Device Manager. However, it's icon never shows up in My Computer, and the system insists that it can't see the drive. It has power and loads and spins discs.
Any ideas? This would be the third upgrade in 6 months, this is getting damned expensive. And for the record, I had more trouble with two Gigabyte mobos than with the dozen or so ASUS's I've purchased over the years. Caveat emptor.