Chosen Solution
iPhone will not reboot
Boot loops point to either hardware or software. For starters if you’re handy with a tool kit I’d try disconnecting the proximity sensor / front camera and seeing if the phone will allow itself to boot. You can also try to connect a strong power supply to rule out of the phone is just not receiving enough power from the battery. If that is still not working you can try restoring through DFU mode to rule out software. https://support.apple.com/en-us/HT201263 If these two things don’t work it is likely an issue with the motherboard itself and frankly is not worth fixing on a 6 unless you have data you need to recover. Good luck!
