Computer Randomly Shut Down
I'm trying to help my friend out with his computer. It's a relatively new computer (about a month ago), and it was built by some other friend.
Here are his specs (off the top of my head, I don't remember the specifics or his actual hardware)
Windows Vista x64
3.0 Ghz Phenom II X4 940, with Arctic Cooler Freezer (I think it was overclocked to something higher.)
2 x 2GB DDR2 memory
Rosewill 650W PSU
1 GB nvidia video card
He called me on his cell and told me when he was playing a PC game (Left 4 Dead), the computer randomly shut down on him. He couldn't turn it back on. As in no power LED, no fans spinning, nothing popped up on the screen, didn't make a sound...nothing!
Then I told him to turn off the PSU, turn the PSU back on, and then turn the computer on. It worked somehow.
The thing is I want to know why it randomly shut down on him so that it doesn't happen to him again.
A faulty power supply? Bad motherboard? Bad video card? High temps? Didn't overclock it correctly?
If it's the PSU, anyone know if there's a program that tests for faulty PSU's?