I am hoping you guys have some suggestions here, I have been looking at a pc which seems to be changing its resolution at random, it will work fine for a while and then the screen will go black for a few seconds and then come back with a changed resolution, it will then go black again and then revert back to the original resolution. Its a Gigabyte AM3 mobo with AMD onboard graphics. Thinking it might be a graphics issue I installed a Geforce 8400 GS PCI card which worked fine for a few weeks but now we have the graphics issues again. I am assuming that as it had the problen with 2 different graphics chips, one onboard and one on the PCI card that its unlikely to be a graphics issue. Could it be an issue with the monitor which is a 17" Dell TFT?