Booting Up -- Or Not

I should be selling the d8b this weekend if all goes according to plan, so I wanted to test out the spare CPU / power supply that I bought several years back. Unfortunately, although everything powers up, the spare doesn't boot. I suspect that the BIOS settings are corrupt, so I've popped the battery out of the board, unplugged the unit, and will wait and see what it has to say tomorrow.

Sadly, there doesn't appear to be a "clear BIOS settings" jumper on this motherboard. Because that would be too simple...