do you have both the 20pin and the 4-pin connectors hooked up? just eliminating stuff...
Problem: Computer turns on, nothing on monitor, but powers off after 20 or so secs.
Mobo: ASUS P5GD1-VM
Intel P4 (obviously0
RAM: Kingston 512MB
HD: WD 250GB
Power: 500W ATX
this was a custom built computer, and this is the first time I am powering it up so i am not sure what the prob is.