How can I figure out what is wrong with my iphone 6 plus?
We recently bought it off of eBay and it was broken and not working at all. So, recently we had also ordered parts and things and I sat down and worked on it and it looks, sounds, and feels brand new, however the screen only will light up to a black screen. No apple logo, no words, just light and sounds and vibrations. So, I broke it down and found out that the metal plate on the back of the screen had a wire that was broken, so it wouldn't connect to the mother board, so I ordered that part. What does the metal plate actually do?