I just put this together, here are my specs:
Chaintech MPM800-3 motherboard
512 DDR400 RAM
on-board video card
Pentium 4 2.26 processor
All seem to be installed correctly, the computer starts up and all the fans and everything starts, but it doesn't seem to want to work.
I've tried resetting the BIOS, I tried moving the motherboard to a cardboard box just to make sure it isn't shorting out, and I've tested the power supply and I know it works (300W).
I would just say its just the motherboard, but I've gone through 3 others and all the same thing happens. I feel like I must be missing a switch or something, but nothing I can think of works.