Screen replaced, now rear camera wont work.

Here's an interesting one. Customer dropped there phone causing the right side of the digitizer to stop working. There was no external damage though. I replaced the screen and when I fired it back up the earpiece speaker isn't working (ordered a new one) and more strange is that the front facing camera works but when you switch to the rear facing camera it freezes the app. In snapchat, the button to switch to rear facing camera isn't even there anymore. Has anybody seen this before?

Thanks!