I have an ATI 3d Rage card built into my motherboard. I have purchased a Visiontek GEForce 4 MX420 card and installed same. At the time I first did that somebody had given me the sequence of events to disable the on-board card and enable the add-in card. Yesterday, somebody moving the computer accidently plugged the monitor into the on-board device rather than the GeForce card. Now I get no display ... completely black. The only way I can get anything is to plug into the add-in GeForce card, but the screen goes black after system post. I can F8 at that screen, though, and go into Safe Mode. How do I get the system to revert back to the way it was; i.e., ignore the on-board card and look at the add-in? I guess plugging it into the on-board card caused it to disable the other? What a mess! Thanks in advance for any help.