longscope

Could be a heat issue. Sometimes an overheating laptop will shut itself off in order to prevent the cpu from... well, melting really. check to see if the temps are too high using a temp tool, or you can reboot after a shutdown and check it in the bios hardware …

I had a videocard that did that when it was going bad, but it really only happened after I was playing games. If it's an onboard video, see if you can borrow a videocard from a friend and see if does the same thing with theirs. If not, you know …

Last time I did a build I had the power and the reset connections reversed... double check your connections and see if that works. If not, you can always pull and re-seat the ram, video, etc.

Sounds like your graphics card may be about to die or in process. What kind of video card do you have in there? Could also be a power issue, but since it's a P4 I'd wager that it's just an old box that has one or the other going bad.

Hi everyone, I have an odd problem I'm hoping someone can help me with. I have a custom built pc with a Asus a8n5x mobo. it's a socket 939 running a Athlon X2 4200. The computer posts ok (1 beep) and goes to the bios. Once it hits the bios …