I bought a new computer awhile back and eventually upgraded the video card, worked fine.
Then I bought a new CPU, took out my current cpu and then realized that the new cpu was the wrong socket, so I returned it and replaced the old cpu.
After I did that every time I turn on the computer it will turn on for anywhere between 10 second to 1 minute and then shut off.
I've tried different power supplies, video cards, i've unplugged everything and tried turning on the comp with just the cpu and ram and video card.
I think its an overheating issue because depending on how long I let it rest determines how long it stays on before it shuts off, although in the bios hardware monitor it says the cpu is running between 45 and 47 celsius which is fine and the system temp is approx 30 celsius.
The Motherboard is a MSI K8N Neo2 Platinum and the cpu is an amd athlon 64 3800+ with a geforce 6800 vid card.
The only thing I could have though of is that I noticed the fan for the chipset processor had been unplugged, but plugging it back in fixed nothing, it still turns off after awhile. Unless the motherboard temp monitor is lying to me I really cannot figure out what the problem is. Any opinions?