Chosen Solution
I have an iphone 6 that has had screen and battery replacement done but randomly had just went blank. The black light it on and it vibrates when charger is connected. The screen does not respond to touch, only button response. Could the LCD have burned out?
It could be a bad replacement screen. If the old screen was till functional, I would re-install it to see if the problem is screen related. If it isn’t then take a closer look at the condition of the flexes and connectors to see if there is any damage such as kinks, tears or if any components are missing near the connectors on the logic board.
