Chosen Solution
Hi. I recently got an Iphone 6 that is stuck in apple logo boot loop. I figured out that if i unplug the main button connector from the board, phone boots up normally, and if i plug it again on the board, siri appears and after 4 seconds phone shuts off and keeps restarting. What can the problem be? Thank you!
You probably have a defective power button flex. I would order a replacement flex and install it to see if that completely eliminates your problem. You can follow this guide.
