Tru,
I agree with you to a point. That is why I asked him in one of my posts if he had checked the inside to see if the fans were working or not. Over heating will cause a similar thing, but this was before he finally told us about the APC software. Try the easy stuff before tearing into the computer and replacing hardware. And most power supplies or anything else in a computer will only do this so many times before they stop completely as the marginal part is going to fail with heat. And from the tone of his posts this has been going on for sometime and since he installed the APC software. Plus I have never seen a marginal part just turn a computer on by itself as he stated his was doing when he walked into the room. Not saying it can't happen, but just that I have never heard of it happening. Fred did not make very clear in his first posts just what and when the problem started.
Ron