I have a Compaq Presario S4020WM pc. The Compaq PC will boot up, but will not display any video. It stays on as long as I don't turn it off. I installed a nVIDIA Geforce PCI video card to see if the integrated motherboard video card was shot. I did not get any video from the nVIDIA either. My question is, Is there any way that I can force video to the PCI card and does the lack of video signal from the integrated video card means that it is shot?