I assembled a PC from scratch about 3 year ago. It has worked well for all these years other than a slight heat problem that I solved by adding an extra fan. I used a ASUS P4P800 SSE mobo P4 CPU, nvida FX5200, 2GB ram. All of a suden it went dead other than the fans, a green light on the bottom of the mobo and the blue power switch light. The poer switch does not turn it of, just the cut off in the back. My wife uses the rig and she rarely turned it off, it did freeze occasionaly. I tried disconnecting most of the ram, hard drive, video card and then powering up nothing. I was thinking it was the PSU because she had it running for "3 years straight" ;)then I was think the CPU may have finally expired form the old heat issue.
Hate to buy both or maybe a new mobo. any suggestions.