Did you remove the Cmos battery and then unplug the PSU and hit the start buton serval times to completely remove all residual capacitence from the Mobo first? If, after removing the battery, you still cannot enter the bios, find the mobo reset jumpers, they are usually right next to the CPU and jumper the board from position 1 to postion 2, and then restart the puter. You will get a check sum error generally). Power down the mobo and put the jumper back to position 1. Now your bios should be at defualt if the cmos battery removal trick didn't work. CONSULT YOUR MOBO MANUAL TO LOCATE THE BIOS RESET JUMPERS!!!!! If all else fails, reflash the bios! But be careful! If you have the worng bios flash....start looking for a new mobo!!!!!!
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EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.