No image, only backlight.

So the problem is displayed here: https://www.youtube.com/watch?v=ZtCgmE5Q... . The screen wont show anything, but the backlight still works. The touchscreens also works because it vibrates when I try to type in my pin code. Could it be that something came loose when I dropped it face down? The rest of the screen still works. What should I do?