My laptop has pink lines on the top and once every three seconds the pink lines turn green and my laptop screen freezes for 1 second.it has been happening for 2 days. I have used snipping tool to take a picture and the picture is fine without any lines. The lines appear on black background and donot appear on a whit background. But the screen is freezing irrespective of what background it is. I dont know what the problem is. I have updates the drivers. The lines appear on the boot menu. Is my screen broken? My laptop didnot fall or anything. Can anyone tell me a solution to this problem?