I have had a problem with my PCI video card on my computer running XP. The PCI card after moving was not recognized and the computer defaulted to the onboard VGA. AS part of diagnostics (a little knowledge is bad!) I went to the control panel display and noted it was using this and instructed it to disable the feature. The computer rebooted To what I was hoping the PCI card but after successfully showing the Windows XP splash screen the screen goes blank!! I cannot get into the control panel to correct my error. I have accessed the BIOS on start up and don't appear to be able to cahnge anything. Help