OK I was working on a Dell Dimension 8200. it has a garbled display it boots up fine but you can barely read the screen. so I suggested a new video card. I put in a new agp card and it worked until they restarted it. it would show the dell splash screen and then just sit with a white cursor in the upper left corner. I also tried other agp cards and even a pci card but all give the same result. even the original card still only goes to a certain point. and something garbled blinks. if i try to press F2 to go into bios it says Error 8602 Auxiliary Device Failure.