i had my screen broken unfortunately. I received a replacement that i don't know if it is an official one, that was excellent until i put it to charge. The screen lightly flickers. I don't have an official charger and mine outputs 5v and 0.18A. when the phone is down the screen is ok. It flickers when i touch the metal to the side of the battery.
This happens even when minimal pressure which suggests a grounding issue? When non conductive materials touch the side - even if with a lot of pressure nothing happens. And finally, this happens only when charging. My phone is Samsung Galaxy J5 (2016).
EDIT 1: I can confirm it is a grounding issue because when i touch the metal surface with a metal connected to a GND, the flickering stops completely
EDIT 2: I went to the repair shop and got an official Samsung charger (5v, 1.55A). The flickering has almost vanished. You have to pay real close attention to see a very slight flickering when it charges and you touch the metal surface around the screen. Still no clue on what is happening.