...then went black.? I checked the cords to make sure they weren't loose and when I did it came back on. Last night it flashed and went out again. This time it didn't come back on when I checked the cords. I pulled all the cords from the monitor out and put them back but it still won't work. I'm think my monitored burned out because when I turn on the computer it's running. How do I know for sure if it's just the monitor and not my computer?