Computer monitor problems can be very hard to troubleshoot - I mean, if your monitor goes blank, how do you check anything on your screen. So that's why it's important to have 2 monitors in the house. Usually, if I have my desktop PC's monitor going blank, I'll immediately hook up the video card to another monitor. If the screen remains blank, then it could point to a video card problem. If the new monitor displays an image, then it's probably the first monitor that has run into problems.
