My specs are in the signature below. A couple of months ago, my 'puter would act funny when I turned it on. I could hear the hard drive whirring, but the monitor would not come on and my mobo was telling me system failed cpu test. I would turn it on several times, then almost by magic it would work after the fourth or fifth time. I've stripped the thing down, took off the heat sink, reseated the chip after cleaning the surface, reapplying my arctic, and putting the sink back on. I had changed nothing to my system when it started happening. I'd guess my mobo is about 18 months old, same with the Pentium 4 chip. I'm wondering why it's happening intermittently. Is it a chip issue, a mobo issue, PSU, or something else? I'm stumped. Need some advice.