Mend My iPhone
Hi folks.

I've done a couple of SE repairs recently and the phone has then developed a boot loop which includes a working phone for a few minutes and then a restart and boot loop.

I've used 5S screens and SE screens and can't work out why it's started. I also switch these phones off and pull batteries for the repair. I don't trust them.

I've tried updating software, pulling batteries and changing them, they surely can't have a hardware problem. 

Does anyone know what the fix for this is please as it's irritating me.


Thanks in advance.
http://www.mendmyiphone.co.uk
Specialising in iPhone and iPad repairs.
Mobile
tel 07934 062949
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MACH Computers
I had the exact same issue recently. Check the diagnostic logs and see if the battery comes up somewhere. 
Chris - Owner
MACH Computers Kent

W: http://www.machcomputers.co.uk
E: service@machcomputers.co.uk
T: 01622 236343
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Mend My iPhone
Thanks for your response. What do you mean by diagnostic logs and did you solve yours as mine still got a boot problem. What did you do to resolve it. 
Thanks. James 
http://www.mendmyiphone.co.uk
Specialising in iPhone and iPad repairs.
Mobile
tel 07934 062949
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MACH Computers
If you go to settings > general > diagnostic & usage data, have a look for a log for the time the phone rebooted. 

I'll have to check the job sheets when I'm back in the office to see what it was I did but I know for certain that i did resolve it. IIRC it may have been a battery change that sorted it but I'll check when I'm back in office tomorrow morning. 
Chris - Owner
MACH Computers Kent

W: http://www.machcomputers.co.uk
E: service@machcomputers.co.uk
T: 01622 236343
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Bytesize
as MACH has said, try another battery in it, if that fails try connecting to itunes in recovery and do an update NOT RESTORE, had an iPhone 6s in today with bootloop and the update cured it albeit I did connect known good battery and dock connector before doing so.
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Mend My iPhone
I'd tried another battery before at the time but after a software update it kept doing it. I tried a new battery and restarted it and it stopped it doing it. Odd one. I appreciate your input and help. I was thinking it was a lost cause - put the old battery back in and it's working fine. 
http://www.mendmyiphone.co.uk
Specialising in iPhone and iPad repairs.
Mobile
tel 07934 062949
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MACH Computers
I still can't remember what the exact line is in the logs which mentions the battery but I've done another handset this week that showed the exact same symptoms. I've tried doing a bit more digging around to see where the link appears but the only thing that I can see is that the fault is not present before the battery is disconnected but it is after its reconnected. Must be something to do with the way the handset is interpreting the battery data - at least thats the logical thing to me. 
Chris - Owner
MACH Computers Kent

W: http://www.machcomputers.co.uk
E: service@machcomputers.co.uk
T: 01622 236343
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Matt_M
Having this problem - followed procedure like every iPhone repair. Battery disconnected first, then reconnected right at the end. Battery on phone however is stuck at 7% and will not rise even though the phone indicates it is charging.

Any ideas?
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Andy @ ACE-Repairs
Matt_M wrote:
Having this problem - followed procedure like every iPhone repair. Battery disconnected first, then reconnected right at the end. Battery on phone however is stuck at 7% and will not rise even though the phone indicates it is charging.

Any ideas?


Matt sometimes a simple soft reset will sort it.  Do you have a USB ameter to measure the charge rate?  If not great tool.
Your better of starting a new post with the full facts eg what phone, history, what you repaired etc etc.  Easier for us to try help. 
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