iPhone 5 with faulty logic board, repair?

Question

iPhone 5

Sesto modello di iPhone Apple, annunciato il 12 settembre 2012. La riparazione si fa in modo simile alle precedenti versioni di iPhone e richiede cacciaviti e strumenti di apertura. Disponibile con tecnologia GSM o CDMA, con 16, 32, o 64 GB, nero o bianco.

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lekice @lekice

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Postato: 24 mag 2014

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iPhone 5 with faulty logic board, repair?

Hello.

After many days\ weeks \ month with testing I have concluded that I have a faulty logic board on one of my Iphone 5. I have tested the logic board in different phones and the problem continues.

The Logic boards seems to work OK. But the battery discharges after 3-4 hours and after that its dead.

Then i have to take out the battery, charge it for some minutes in another Iphone 5. Put it back again, and then it works again, charges up to 100%, but discharges after 3-4 hours.

Is there any way to fix this? Or is no point? I have cleaned the logic board with isopropanol, and there is NO water damage to the board.

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score 0 · Answer 1 · 2014-05-24T19:26:49-07:00

jessabethany @jessabethany

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iPad Rehab--Microsoldering, Mail-in Repair, Data Recovery

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Postato: 24 mag 2014

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This is almost certainly a failure of the U2 chip on the board. There was once someone on here who said he could do it. It may help to guide you to google "iPhone 5 U2 replacement service" or something like that.

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Tom Chai @tomchai Rep: 73,8k 19 111 82 · Answer 2 · 2014-05-25T00:06:39-07:00

Tom Chai @tomchai

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The logic board has leak current problem. Try restore to the latest software to rule out software issues. If nothing changes, check all functions like camera or audio. Also plug it onto a Mac with Xcode to check device logs. You may be able to narrow down the faulty hardware like camera or audio chip not responding.

If everything seems to be working, then this repair is going to be difficult because it is very difficult to identify a broken component if everything seems to be working. Try starting with U2 as jessa suggested. U2 is the USB interface chip if I remember correctly.

If you replace the U2 chip and the phone works, blame Bono for the fault.

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