I should add some more info:
First thing I do when I get a no post is to clear the BIOS.
This has solved many non-post boards.
I then replace the battery.
I even try booting with an old PCI video card to make sure it's not the AGP slot.
I double check to make sure the processor I'm using is compatible.
I have 3 different memory chips that I try in the board.
The only thing I hook-up when testing is memory, processor, and video card.