I just finished building 6 work stations for a new business i'm starting, so I'm reasonably competent at building computers. I'm totally stumped building the server. I'm using an Asus K8N-DL mobo with dual opteron 280's, 2g's of ram per CPU, and dual Western Digital Raptor 150g SATA hard drives, with a PC Power and Cooling 850W power supply. On booting up I get the normal post beep and holding down the delete key it says its entering set-up, but never gets there. If I hold down the tab key, it boots to the post screen and shows its seeing the dual opterons and all the memory, but shows no hard drives. The case is hot-swapable, so I have pulled out both drives and can hear them quietly spinning. I 've tried resetting the CMOS per the manual instructions and solved nothing. I've tried unplugging the SATA drives and plugging in an old, but working, IDE drive and it doesn't see it either. The green power LED is glowing. but the red HDD LED is not. I've checked the ASUS website and the board has the latest BIOS version. Help! Also, when I'm in the post screen, I get no response if I press delete to enter set-up. I hope it's just something dumb, because I really need to get this maching working.