It sounds to me like your video cable's loose. This happened to me when I upgraded my Rev. A iMac with the GameWizard VD2 card. Because of the way the 3dfx card is installed (under the motherboard), it has a tendency to pull the video cable attaching it to the mb out. Hence your ability to control the machine: your computer's fine, just--for the moment--lacking a video signal. Such, at least, is my guess.<br><br>