Dead logic board or...?

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iPhone 7

Released September 16, 2016. Model 1660, 1778 Available as GSM or CDMA / 32, 128 or 256 GB / Rose Gold, Gold, Silver, Black, and Jet Black.

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novak.tomais @novaktomais

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Posted: Jan 25, 2019

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Dead logic board or...?

Hello everybody. I have an iphone 7 128gb. I suspect the logic board being kaputt.

Phone only reacts to charging when off. As soon as it boots, no charging. Battery constantly shows 1% even tho it has more. I tried replacing charging port - no help there. I replaced the battery - no help there.

Do you think it is a faulty chip on the motherboard? It no longer reacts in DFU mode which is funny. It goes there but the PC does not recognize it. Thanks for any input. :-)

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Minho @refectio

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Posted: Jan 25, 2019

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Most likely…any charging related issue is usually battery/charge port/logic board. If you have eliminated the first two, then the logic board is next in line. It would help if you gave us a bit of background on what happened to the phone in the days/weeks leading up to this issue. Was it dropped, repaired or came into contact with water?

You’ll want to find a shop that does micro-soldering repairs and they can properly troubleshoot the phone for you.

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I get my phones by assembling them. I buy housing, flex, lcd, logic boards and put it together. I wanted the 7 as a backup phone....I assembled it yesterday, it took a while to boot (like 5 minutes or so), but it was kinda ok afterwards. It charged but slowly. I did DFU restore and it went fine until I had the battery went down to 30% and I decided to charge it. Ever since headphones can’t be recognized (besides airpords and BT speaker) and charging is off..That’s all the history, sadly.

Seller agreed to return it when i told him about slow boot yesterday, but I still wanted to give it a shot and cause him no problems..We’ll see how it turns out :-)

Jan 25, 2019 by novak.tomais

Your iPhone has the Audio IC failure.

The iPhone 7 series of devices have proven to be very unreliable, suffering from flex-based issues similar to the iPhone 6 Plus (Touch Disease). On the iPhone 7, the fault line runs along the top of the SIM card reader and affects the Baseband CPU and Audio IC. Any short copper traces running perpendicular to the fault line while connecting to micro-BGA pads, is subject to failing.

Here are the typical symptoms, as collated by the repair community:

# Voice Memos app / Loudspeaker on call - greyed out

# Siri doesn’t hear you / Caller can’t hear you

# Most other Audio related issues that aren’t solved by modular replacements

# Long boot times (3-5 minutes)

# iTunes detects the phone but stuck on the Apple Logo

This is a repairable problem but it requires a micro-soldering repair.

Jan 25, 2019 by Minho

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I get my phones by assembling them. I buy housing, flex, lcd, logic boards and put it together. I wanted the 7 as a backup phone....I assembled it yesterday, it took a while to boot (like 5 minutes or so), but it was kinda ok afterwards. It charged but slowly. I did DFU restore and it went fine until I had the battery went down to 30% and I decided to charge it. Ever since headphones can’t be recognized (besides airpords and BT speaker) and charging is off..That’s all the history, sadly.

Seller agreed to return it when i told him about slow boot yesterday, but I still wanted to give it a shot and cause him no problems..We’ll see how it turns out :-) — novak.tomais
Your iPhone has the Audio IC failure.

The iPhone 7 series of devices have proven to be very unreliable, suffering from flex-based issues similar to the iPhone 6 Plus (Touch Disease). On the iPhone 7, the fault line runs along the top of the SIM card reader and affects the Baseband CPU and Audio IC. Any short copper traces running perpendicular to the fault line while connecting to micro-BGA pads, is subject to failing.

Here are the typical symptoms, as collated by the repair community:

# Voice Memos app / Loudspeaker on call - greyed out

# Siri doesn’t hear you / Caller can’t hear you

# Most other Audio related issues that aren’t solved by modular replacements

# Long boot times (3-5 minutes)

# iTunes detects the phone but stuck on the Apple Logo

This is a repairable problem but it requires a micro-soldering repair. — Minho

iPhone 7

Dead logic board or...?

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