Neon --
As I said, the machines I built that had these symptoms were dead from the get-go, never booted up, so I don't know if the problem was in the bios or was something else but it was definitely a motherboard problem. In both cases, I RMA'd the motherboard and the new one worked fine.
You will have a Clear-CMOS jumper somewhere on your board, but it may not be marked as such. Look in the manual for your board.
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