I have a Gigabyte 8500GT that isn't working correctly. No matter what connection its using (DVI or VGA) it won't work during boot up so i am unable to go into bios or reinstall an operating system. It does however show up a picture as soon as Vista is loaded. I have had this card for nearly a year now and it has worked with no problems. Is there any reason to why it works in OS but not in BIOS?