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Repair information, troubleshooting tips, and guides for the sixth iteration of Apple iPhone, announced on September 12, 2012. Model: A1428, A1429

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Huge battery drains and always warm

Hello my iphone was working great when all of a sudden I find it dead overnight. After charging it back I noticed it gets very hot and drains the battery like crazy. I have done everything I could find as tips on the net. Reset, hard reset, restore , delete iCloud, add new iCloud, changed frame, battery, checked CPU usage with system monitor... Everything is ok. It's very frustrating now I fully charged it and went to 37% in 1 hour !! I am out of ideeas even in airplane mode it discharges itself all the same

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If you can, remove the EMI shields before soaking in alcohol. Then once it is submerged, clean it gently with a toothbrush or something similar. If that doesn't work, I have seen lately that a bad U2 chip can cause this problem. It is difficult to find someone capable of that repair, however.

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Yeah I'm no expert, but from what I've researched lately, that sounds very much like a U2 issue. I am pretty sure Cyberdoc LLC can replace that for you but they are sometimes difficult to get a hold of. If you can, I would say give them a try.

I actually know another business in Colorado that specializes in BGA rework. They only advertise laptop/PC repair, but I spoke with one over the phone today and they said that if you want a SPECIFIC IC replaced, then they can do it. Try giving them a call:

http://www.creativeitusa.com

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Sound like you have tried a lot of stuff. I know you have an iphone 5 though you might still have the same issue. iPhone 4S (and older) with a dirty/defect docking connector showed just these symptoms. You should check your lightning connector. Start by cleaning it prperly. If that does not help, try to replace it.

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I have changed the entire internal assembly... Baught an icloud locked iphone 5 and swapped the motherboard

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So basicly everithing is new accept the motherboard. Should i soak my motherboard in alcohol to clean it ? Is it safe ? There was never any water damage to my phone to lead to this but im running out of ideeas and patience with this phone

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yeah you could try that mate, but everything is point towards a motherboard problem, hopefully if you soak it in alcohol it should fix it

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It's clearly a U2 chip issue because I've charged my phone with a new cable not original how can I get it changed I have a replacement board.

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Also what I can see in the symptoms leading me to believe it's the chip other than just charging it with the bad cable is that sometimes when I reset or restore the phone it does not start by itself ... I need to power it on manually also the phone refused to charge when the battery was flat once and only I've got it up again with a charged battery replacement

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met the same problem...

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Some of the 5s are eligible for the battery replacement program . As per website "Apple has determined that a small percentage of iPhone 5 users may suddenly experience shorter battery life or need to be charged more frequently " they were sold between September 2012 and January 2013 and fall between limited serial number range. Google iPhone 5 battery replacement program. All you do is enter serial number in. I did and went to Apple Store and they replaced my battery. Good luck!!!!

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Dan will be eternally grateful.
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