I have a Tekram P6-Pro A+ Mainboard/w VIA Apollo Pro 133 Chipset.
The problem is when the computer starts up it shuts down after about 3 seconds. You can hear the HD's start up then everything powers down. Also when I push the On button on the front of the box it sometimes does not start up. I have to push the on/off switch on the power supply itself a couple of times to get it to start up. I have tried a new power supply (exact same problem continues), re-seated the CPU, unplugged all devices except one HD. It does not get to the point of letting me into the BIOS settings.