I had a weird occurance a few minutes ago. I was watching a recorded tv show in Media Center. Near the end of the clip, the monitor went completely black. I turned it off and on, nothing showed. However, I could see the monitor menu and settings when I pressed the buttons. I ended up shutting off my power supply to turn the computer off, then turned it back on and booted up...everything works fine. Any ideas as to what the problem was?