Chosen Solution
Hello i have an iphone 6, that had a restarting issue, i set aside and it had the same issue for nearly 2 weeks, after taking it apart found out it was a grounding issue, i have replaced most grounding parts and the phone was working flawlessly. i have tested it with a sim card and tested playing a youtube video for quite some time and the phone was perfectly fine. i got a new glass for it as the glass on lcd was broken. once i got the glass i was going to give the phone a final test before starting to isolate the glass from lcd however the phone is not turning on or showing a charging symbol, i have tried multiple batteries, and checked the vcc main line, there is no short beginning from cap above battery terminal, all the way to the cap beside the wifi chip. What can be wrong here, any help appreciated !
Did you tried to clean or replace the Charging Port?