So you're saying when you hit the power button the fans come on and everything appears to power up, but you never get any video or post beeps? You mentioned messing around with the "dummy" ram. I'm a bit confused by that. Rimm 4200 is 32 bit single channel rdram. It doesn't require pairs of ram installed, but it uses a continuity rimm in empty channels to complete the circuit. Is that what you're talking about? You do have all of the power connectors hooked up right? I mean the EZ plug, aux, and main. Have you tried clearing the cmos and holding down the insert key while powering on? This sounds just like the dual xeon supermicro board I got. It has a weird power connector that most other P4 approved psu's don't come with. I tried to see if it would run without it. I got the same thing. Everything comes on - fans, hard drive, etc, but no video or beeps. When I got the correct power supply it booted just fine.