Computer Monitor Keeps Going to Sleep

[Doombard]

So I go to turn on computer a couple weeks ago and it goes to windows and monitor goes to sleep. It won't come back on unless I reboot. At first it would stay on for a few minutes but now its gotten to where sometimes it won't even login to windows before going to sleep. Only thing that I've done to try to fix is open up case and clean out the dust but that didn't help. It's not a problem with power saving options I've already checked that. Also tried reinstalling the drivers for video card and still nothing.

[Arximiro]

Sounds like your video card is going bad, or at least the port your monitor is on.