Tell me if this works for you...I can get my screen to work by doing a little trick, but it's not practical...
If you take your left thumb and pointer finger, and almost bend the plastic towards the top-left corner, I can get a picture on the macbook...I know you don't quite under stand what I'm saying, but it's like...if I push the front of the plastic inwards, and the backside of the plastic inwards, I can get a picture on the macbook (sorry, it's really confusing what I said, I know)