[AC Question]

I have a Galaxy Note 4.

Recently I dropped my phone and the screen would not light up at all anymore. I opened it up and the digitizer was as cracked as the screen so I figured all I had to do was replace it. Well, I put in the new one and the same problem persist. Sound and lights work but nothing but black on the display. I thought maybe it was a loose connection so I took it apart again and checked the motherboard for anything not sitting correctly and couldnt find anything.

Does anyone have any ideas on what else I can check before I buy a new motherboard and hope for the best?