I recently replaced my motherboard, processor, memory, and power supply. After powering up and running for approx. 3 minutes, the rig shuts down, like somebody pulled the cord out of the wall. It won't power back up either instantly. I have to wait a while before I can even turn it back on.
At first, I thought it was a heat issue. I powered it back on, went into the BIOS, and watched the CPU and chassis temperatures. They never went over 90 degrees Fahrenheit.
I'm using the on-board audio and video; no other components are hooked up aside from hard drives and dvd burners.
I'm thinking it's the power supply, but I'd like to get some ideas from the community as to what else it could be.