Does your video card seat completely at the far back? My current case has a slight alignment issue with my Soyo mobo, and if I do just about *anything* in my case it's enough to make the video card come out of the slot and keep the system from powering up. Oddly enough, it "should" beep that there is a video card failure, but the connection must be good enough to show that it's there, but not good enough to let it run.