Display Stopped Working, can't find the problem.

So I dropped my tablet the other day, and the display stopped working. The screen didn't crack and I know the tablet still works since I can still see the backlight and when I plug it into a monitor with the hdmi port it still works fine. I just can't see anything on the screen, its just a backlit black screen. I've opened up the back to see if it was as simple as something coming loose but I can't see anything out of place or broken. So now I'm out of luck and don't really wanna take it to a store to pay £50 for them to fix it, if its fixable that is.

Has anyone got any ideas?

I thought maybe it was some sort of display port coming loose, or breaking, but I have no idea what stuff is what when I open up the case.