Chosen Solution
Title says it all. iPhone 6 won’t power on nor connect itunes (Battery & LCD works!) Bought the phone used and known nothing about the phone. I swapped the LCD & battery from another KNOWN GOOD iphone 6 into the KNOWN bad iphone 6 and it still didn’t power on. I tried hard reset both with just the phone and while connected to the pc using the known good components, and still no response of any kind. Hard reset by pressing home + power for over 20 seconds. The iphone looks clean without any damage. I might swap the motherboard to see if that yields any result.
Did you try powering the device by using the charging cable (to a charger) to plug into the phone instead of holding the power button?
