The Apple iPhone 5s was announced on September 10, 2013. Repair of this device is similar to the previous models, and requires screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Silver, Gold, and Space Gray.

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Bootloop - Wont connect to computer to restore.

Can anyone help me?

I have an issue with a 5s where it is stuck in a bootloop. It will boot to an apple logo for a couple of seconds then turn off and repeat. The odd time when its turning off i get a red screen but not everytime.

When i attempt to connect it to itunes/computer it wont connect. Its like its being turned off completely even when i try to put in recovery mode or dfu mode.

I have tried 3 different screens, a good few charging ports and home buttons. I have changed the board into a couple of different housings that i have spare.

I have also replaced the battery with a couple of them that i had brand new.

I have also had the board under a microscope and done a full inspection but found no damage to any components. I know the history of the phone as i used to use it so i know the board was kept well.

I have a feeling it may be to do with the battery but the battery has been tested with 4 other 5s and it works perfectly.

Can anyone help me on this? I cant find any similar problem on the internet and ive never came across a bootloop where i cant connect to my computer.

Thanks in advance :)

Answered! View the answer I have this problem too

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So what was the result of moving the logic board to other housings? Does the problem follow the board or stay with the housing/flexes in question? Have you checked the LCD Bracket standoffs for Long Screw Damage?

With everything you have tried, I would have to think it is logic board related. You should test the main voltage rails (PP_BATT_VCC, PP_VCC_MAIN & PP5V0_USB) and let me know the values. Let's start with that.

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craig will be eternally grateful.
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