Chosen Solution
Replaced battery and reassembled phone. Everything worked fine except the ear piece. Disassembled and checked all connectors. Now, nothing happens. Phone will not energize or show charging. Nothing. IPhone 6 Plus
Try unplugging the battery again then reconnect. Then plug it up to a charger and let it set for a min or two.
Are you Sure the screws were put back in the right place long screw damage is an issue like this iPhone 6 logic board - long screw damage
