My computer will shut down windows normally, then 10 seconds later there is a clicking sound from the ABIT AN8 motherboard and the PC turns on again. This happened after an "install shield wizard" would not close and I tried to reboot from windows XP but it failed to reboot. I can "fix" it by manually switching off the power supply after shutdown.
Next day I want to start it up again, I turn the power supply (antec smartpower 500W) back on, push the power button, and the computer is stone cold dead for 5 minutes. After 5 minutes pass by, the motherboard displays a "2" and goes "click click..... click click..... click click..... click click..... click click....." and the PC lights come on and the fans start to turn, but only for a quarter second or so. Kind of like an old car that wont start. After it repeats its attempt at startup about 10 times, it finally starts up and all is well.
I can "fix" that by turning the power supply on and waiting 10 minutes before I turn the PC on, then pushing the power button will usually turn it on normally. Is this a power supply issue or a mobo issue?
Specs: ABIT AN8 mobo. Athlon X2 4200+. Antec SmartPower 500W. Windows XP home.