I have a toshiba satellite laptop. During use the screen has started going pure white. The only way to get the display back is to turn it off and back on again. It often flickers. I think it is a connection issue. Is there a way I can check this myself ? If I plug another monitor into the back when in this state, the other monitor shows the display with no problems, so I don't think it is the video card or motherboard. Any ideas and is it possible to Thx.