Quote Originally Posted by ziddey
Agh, looks like my rev2 might have ate my d9's completely. It's running f10. I was making some changes here and there, but mostly in the conservative direction. The last setting I tried to make was 400 1:1 5-5-5-15 normal memory, 2.1v. Haven't seen a post in over 7 hours now. This rev2 in the past tended to rebound from these problems better than the rev1 I had. But this time it was tragic. I pulled a stick of ram. Reset the cmos. Still no dice. Pulled the other stick. It beeps. Ok... so at least it's working enough to be able to beep memory error. Put the other stick in and try again. Nada. Computer just goes up and down and up and down, unless I hold the reset switch. Then it sticks on but doesn't do anything.

I powered the thing off for the night, but now it's morning and still no go. I've had just about all I can take. It's too bad I'm past my 30 days or else I'd rma the out of this thing. Maybe I'll follow dnottis and pickup a p5b.
The board is fine, the problem is memory voltage.
You need to get another stick of RAM, el-cheapo 256MB DDR2-400 is best, boot up, go into BIOS and bump up memory voltage a lot (mine works only on +0.7) then shut down and put your RAM back.

This can happen after you flash BIOS, it happened to my DS3 when I flashed to F10 - stupid post loop.
Worst thing is that before I flashed F10 my RAM worked fine with relatively low voltage (RAM is rated at 2.1v), not it needs +0.7v
Flashing old F6 BIOS didn't help