Chosen Solution
Hi guys, I have a friend’s iphone 6s that I am trying to fix. It will not turn on at all or be recognised by itunes (or 3utools for that matter). Have tried disconnecting the battery and trying soft resets on both mains and pc power but no response… Is this a case of replacing battery/lightning assembly or is it the board like I suspect? (I am new to this!)
Do you have access to a multimeter? If you do, you could measure the voltage directly at the battery. If charged even somewhat, it should read anywhere from 3V to 4.2V. The closer (or lower) it is to 3V, then it will not have enough power to boot the phone. You can use a USB Ammeter to determine if the phone is really drawing current when it says it’s charging. If the battery is depleted or doesn’t take a charge, then consider replacing the battery to see f that helps. If it doesn’t solve the problem, then you may have a bad Lightning Port or a logic board issue which would require a micro-soldering repair.
