For those trying to replace a broken screen: for me the replacement screen didn't work at first after reassembling, it lighted up but image was a complete mess. I had to reopen the case and unplug and replug the screen connector quite a few times, jam it left and right a bit, and now it works like a charm.

I just had to find the perfect spot, as surprisingly enough it didn't work when the connector was plugged properly all the way in...