Released September 25, 2015. Model A1688/A1633. Repair of this device is similar to previous generations, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 64, or 128 GB / Silver, Gold, Space Gray, or Rose Gold options.

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iPhone 6s stuck in boot loop

My friend is selling an iPhone 6s he bought refurbished off of ebay 2 months ago. Just today it got stuck in a boot loop, in such a case where he can turn it on by doing home + power but it shuts off moments later and goes into the loop. Techmedic told him there was nothing they can do, and an Apple call told him it would be $300 to repair due to hardware damage on main parts (presumably the logic board? Actual part wasn't disclosed in the call). He's selling it for $100 and I was wondering if it was worth it in that it might not actually be hardware problem, or if I should just steer clear if it likely is.

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Has another battery been tried on there?

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It has not, but would Techmedic have thought of that?

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Sounds like it could either be hardware or software, what color is the Apple logo when in dfu mode? Have you tried a hard reset with iTunes?

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I am assuming that the device worked properly for the two months he/she had it since buying it off eBay? And did anything happen just prior to the boot loop, like contact with water, heavy drops or impacts or a repair attempt?

Try these things (if you haven't already) to see if anything helps:

  • Try a hard reset (Home & Power button for 10 secs)
  • Use a genuine Apple Lightning connector
  • Use a genuine Apple charging brick and let it charge overnight
  • Try to connect it to different computers (mac/pc if possible) with an updated iTunes
  • Put the phone in recovery mode (search DFU Mode). Careful, this can reset your data
  • Use 3uTools for putting it in and out of Recovery Mode
  • Use 3uTools to flash the firmware (you can't downgrade)
  • Check the condition of all the flexes (with magnification)
  • Disconnect the Front Camera Ribbon from the logic board and reboot your phone
  • Disconnect the screen assembly completely and see if iTunes will recognize the phone.

Otherwise, you may have a logic board issue. If you are uncomfortable doing these steps, consider finding a repair shop to do the troubleshooting. A shop that also does micro-soldering can go deeper if the problem is not modular in nature.

If it is repairable, it will almost certainly cost less than $300.

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