Released on September 19, 2014, this 5.5" screen iPhone is the larger version of the iPhone 6.

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iPhone not turning on after back case is replaced.

Hello all!

i have a problem with an iphone 6 plus where so far google and posts on iFixit Forum have not been of much help. I will try to describe everything as good as i can.

Original job was to replace the back housing on an iphone 6 plus but after i finnished the job the iphone just turns off after 5-10 seconds after i push the power button. ill explain everything i did during the job in steps.

1. Power off the phone

2. SD wrist band on and make sure the ESD matt and the wrist band is properly grounded.

3. opened it and removed the battery.

4. Removed the display.

5. started removing everything else carefully.

6. put it all back together in the same order carefully.

And thats all. i am 100% sure all screws are in correct place as i used the screwmatt for iphone 6 plus.

i plugged in the charger and tried to turn it on. The apple logo shows up for a few seconds before disapearing. after the apple logo disapears you can still see light from the back of the screen. i've added a video on youtube so you can se exactly what happens. VIDEO

In these cases people on the forum suggests connecting to itunes. I tried that and none of my computers with itunes can see the device. Doesnt even make a sound when i connect it or when the phone powers on.

I opened itunes and connected the lighning cable. i held the home button for 3 seconds then i held the power button until i saw the apple logo and released the power button. This with no luck. I have also tried several other combination regarding the power and home button, with no success.

as mentioned earlier i uploaded a video to youtube so you can see for yourself. VIDEO

I have also tried changing the battery, changing the docking/AUX port cable (2 times) and a brand new display. Also without success.

Please help me! i hope someone have a solution.

Answered! View the answer I have this problem too

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Did you use metal pry tools or plastic pry tools?


@cam2363 i used only plastic tools to pry.


Take it apart again, clean everything off with 99% isopropyl alcohol and put it back together again.


The solution was using 3UTools and flashing the firmware :D


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1 Answer

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Something must have gone wrong during your transfer. You have already tries several things so here are some additional ideas:

  • Check all of the flexes for damage. It could be a tiny tear or puncture. Ideally, you will want to look with magnification.
  • Check all of the connectors, on both the flexes and the logic board. They are very delicate and can be easily damaged when they aren't lined up properly prior to insertion.
  • Check the screw holes for the screen bracket. iPhones are susceptible to "Long Screw Damage", which is when you put a longer screw in place where a shorter one should be. This scrapes the underlying pcb and can damage traces.
  • Go bare bones...connect just the battery and Lightning flex to the logic board and then plug in a genuine Lightning cable connected to an iTunes enabled computer to see if the phone is recognized. If it works, then add modules one at a time (always disconnect the battery & Lightning cable when you do this).

Also, generally speaking, these are some things to try when you have boot looping (you may have tried some of these already)

  • 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)

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.

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