Hello, my screen on my Dell studio laptop goes black when I'm working. You can see the impression of the page I was on faintly and the computer does not shut off. When I close the screen, let it fall into sleep mode, and pull it up again, the screen comes alive again and I can continue working. Other people have responded to this problem saying it could be a screen or cable problem...er but I don't know how to diagnose to find out what exactly is the problem to fix it. Any suggestions?