It's a common issue with that old a PC. Google the issue for pictures and more.
Bob
When I push the power button fans barely move and then nothing. I have tested the power supply with volt meter and all have proper voltage. I even changed out power supply with a spare same problem. I then started disconecting power plugs and found the four pin 12 volt plug on the mother board is the problem. With the 4 pin plug disconected the computer will try to power up. I am then thinking mother board or processor. I took the processor out and computer now trys to power up with the 4 pin connected. I ordered a used processor on Ebay put it in and the same problem. The computer is 5 years old and I don't want to spend the money on a mother board if I am off base. Any advice would be appreciated.
Thank you.

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