I have a six year old Compaq laptop with Windows XP and suddenly the screen blacks out and I have to reboot. It is clear the rest of the computer continues to work normally. I've reloaded everything but the problem continues. It happens if I move the computer or perhaps alter the angle of the screen and sometimes when plugging in or removing a USB peripheral. Any ideas what it might be? A loose connection? I can't afford to buy a new laptop right now but am wondering if buying a desktop VGA monitor to plug in would bypass the problem.