Chosen Solution

Hello everyone, i have a problem with my iPhone 6 which is died when i watch video while charging the phone and it’s not turning on at all and no response at all when i plugged in to the PC and the iTunes not detecting my phone. And by the way I’m already replaced the charging flex and the battery but it’s still nothing. What do you think is going on with my iPhone? Thanks before.

Sounds like board issues. Unplug the home button flex and front camera flex from the motherboard and try plugging the battery in to see if the device with turn on. If still no power, you may be having motherboard issues. I would take to a professional.