My laptop powers on but the color of the screen appears abnormal ie. like burning light, too bright. Boots up to login screen.(Sometimes only half-way to Windows logo.) Suddenly, it goes blank black. The power is still on with the green leds still solid. I can not run any test modules because the screen goes black. Usually I could switch screen to external monitor. But now, it won't switch.
What do these symptoms tell us about the problem?