I've had my P4P800 for a little over a week and I decided to upgrade the BIOS to
1010 because whatever version it came with didn't have Turbo mode despite the
fact that it was described in the manual. The flash went OK and the system
booted normally afterward, but when I rebooted and set Turbo mode to On, not
only wouldn't it boot, it wouldn't POST at all. All the fans turn on and the
drives all spin up, but it doesn't beep at all and I don't get a video signal.
The manual says that the BIOS can be repaired by simply resetting the board
after a failure, but the reset button doesn't do it and powering down doesn't do
it. I even shut off the standby power with the switch on my power supply. I've
tried shutting off all the power, taking the battery out, and moving the jumper
to clear the settings, and it still doesn't work. Any more suggestions, or do I
need a new board? If I need a new board, do I have to contact ASUS since it
wasn't DOA, or should I try the place I bought it first?

Here's the rest of the system if it matters:

P4C 2.8 GHz, stock cooler
ATI All-In-Wonder 7500 (Radeon)
2x512M Kingston ValueRAM (on ASUS's qualified list)
Antec TruePower 480W (I have lots of drives)