I had a similiar thing happen to me, I was flashing my BIOS and my mum turned the power off and after that the mobo did absolutely nothing, so i got her to buy me an upgrade ( a ASUS P5Q-E) at the time.
Have you spoken to ASUS about the problem, maybe they know what the beep means, Or maybe it says in the manual.
Sorry to hear that Jin01!! Been through it myself. Here's where I went http://www.biosman.com/ Contacted them Friday at 3:00 PST and was back up and running Tuesday morning (via UPS). Then I sent the chip I wiped-out back and had it reprogrammed for a back-up, now I have a spare.
Shipping, handling the "Whole 9 Yards" $37 Totoal.