Hi stateofgrace. I think it is most unlikely to be the monitor that is at fault. The fact that the pictyre goes blank most often is caused by the computer itself stopping working. You can prove this by turning the monitor off for a while then back on again. If the monitor is the problem, the picture will then be restored. Try playing a CD. If the problem is in the graphics side, when the picture goes blank the CD will continue playing. My guess is that the PSU is faulty or simply overloaded. Have you simply added too many hardware upgrades for a low power PSU?