I have a similar problem.
After accidentally setting memory frequency to 667MHz the BIOS no longer boots. It beeps 3 times indicating a 64K base memory problem.
I've just tried BIOS recovery using the USB and CD methods (yes I removed the yellow jumper) but the PC just beeps 3 times and stops whenever I turn it on.
Is there any way to simply reset BIOS setting to "factory defaults" ? I've removed the BIOS battery but this doesnt seem to clear anything.
It would be better to post a new thread about your problem as it IS NOT related to mine, or better known as a thread hi-jack.
I also encountered the same problem as BrianE-IT said (freezing during LAN flash...) i left it for half an hour then hit reboot, it booted back into my OS (XP pro) fine and stated the bios was updated succesfully! So i guess i am a lucky one. I know this isnt much help but i guessing there must be a way to clear the bios using a jumper and using maybe a floppy drive to reinstall the bios?
Verify your bios verion. That message after reboot mean nothing.