I am trying to help my brother out with a problem he has had for quite awhile. He is now running Windows XP with an 8800 GTS graphics card and a 19'' ViewSonic monitor via a DVI connection. The problem is at what seems to be random times a purple hue covers the monitor and lasts for a random duration. We have ruled out the cable as the problem, as various different cables haven't helped. I just want anyones opinion on whether they think it is the monitor or the graphics card. Also he has 2x 8800 GTS's, both same exact model that he has swapped back and forth but to no help. So again, think its the monitor, or a weird coincidence that both graphic's cards are dying, or something else?