is this a laptop ? if so have you tried plugging on an external screen ?
Yes, Asus G51J, and no, no external screen yet, but how could that make a difference since that, as well as the normal laptop screen, is controlled by the videocard/driver and if that is the problem, it won't work on a external screen either? Not that I'm not willing to try or anything
At this point all ideas are welkom! I'm give it a try..