I have a PC that I built myself (parts list). It has for a number of months refused to turn back on after there's a power failure. I've had to pull the plug out of the back, and then plug it back in and hit the power button to get it going again. After the most recent power failure, even pulling the plug didn't have any effect. Pushing the power button results in no action (that I can see) taking place (no fans, etc).
Any ideas of what might be the problem? Is there a good way to systematically determine which component has failed?