I have a Dell Dimesion 2400 with on board video and a ATI card installed. The on board video was manually disabled when I installed the ATI card. I received a BSOD and the computer shutdown. When I restarted the computer, I could hear the hard drive spinning, the mouse light up, the keybord numlock lit up, but no display. I removed the ATI card and tried the on board video with no luck. I tried to reset the cmos by removing the cmos battery with no luck. What should be my next step?