20 Jan iPhone 7/7+ Audio IC issue
Apple has acknowledged a microphone issue affecting a limited number of iPhone 7 and iPhone 7 Plus models running iOS 11.3 or later.
These are the common problem that occurs due to failure of audio ic in iPhone 7/7P:-
- Speaker button remains grayed out during a call
- Freezing and A grayed-out voice memo icon.
- Phone can get stuck displaying the Apple logo on startup–loop disease.
- No Audio Recording in Voice Memo.
- No Sound in Video Recording throuh either camera
These are the issues caused by a bad connection on the audio IC chip, We do not need to replace the IC . This is the common iPhone 7/7+ audio ic issue.
We have fixed hundred of these cases and we now know exactly what the specific defect is now.
The connections of the audio ic chip on the logic board gets weakened simply from normal use of the phone. This is a very similar problem to the iPhone 6 plus touch disease. The reason for these defects is as—-Dropping phone several time could have the impact on the iPhone logic board that is screwed down into a relatively flexible/bendy housing and this causes the logic board to experience flexion forces that it can’t handle.
This Problem can be fixed by desoldering the audio ic, making the connection strong by adding microjumpers (a thin wire) to enhance the connection of the C12 pad to the master clock line, Reball the audio ic and Resolder it the board. With the microjumper in place, the phone becomes immunized against the recurrence of this classic problem in the future.
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