I got this problem I've been trying to solve for a while now. If I leave my computer unattended for maybe half an hour my monitor turns black and pops an errorbox complaining that my resolution is wrong (wich it isn't). I've tried and turn off screenlock, screensaver and just about anything I could think off but nothing has helped? My monitor is a Samsung SyncMaster 912N and my computer is a Dell Optiplex 170L. I've attached my graphics specs. Does anyone know how to fix this it would be greatly appreaciated!