I brought a new RS400-A with P4 640. I follow the menu and install 2G DR2, a hard drive, dvd drive, dvd r/w drive and ATI S80 128 AGP8X vedio card. I connect the system to a LCD montior. When I power up the system, the bios set up screen would not come up. The system just sit in idle with nothing show in the display. Please help! Thank you! I found that my DR2 memory are bad. With the bad memory, this MB will not boot.