Multiple parts not working after water damage.

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iPhone 7

发售于2016年9月16日。型号为1660、1778。有 GSM 或者 CDMA 网络制式可选。提供32、128或者256GB 的存储空间。提供玫瑰金色、金色、银色、黑色和亮黑色。

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Trevor Smith @tsmith_30

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发帖于: 2018年7月10日

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Multiple parts not working after water damage.

So a friend of mine recently dropped her phone in a pool. Somehow water got in and she immediately turned her phone off and brought it to me. I took the phone apart and cleaned and dried everything and the phone works fine for the most part. Literally almost nothing looks wrong with the phone in terms of water damage. However, there are a few things that don’t work. The earpiece speaker, proximity sensor, loudspeaker, and mics at the bottom of the phone all don’t work. Front facing camera and charging port both work fine though. Along with this, the iPhone takes a long time to boot up (at least like 5 minutes). Wondering if replacing those parts would solve the issue or if it’s something bigger than that. What would be the reason for these parts not working while the parts next to them work fine. APPRECIATE ANY HELP, THANK YOU!

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Also should add that the volume sliders don’t even work on the phone. It’s like the speaker isn’t just not working, but the phone doesn’t recognize that there’s one there. The speaker icon in a phone call is untouchable and in the music app, the volume slider is nonexistent. The volume buttons don’t do anything and in the control center, the volume slider is inactive.

由 Trevor Smith 完成的 2018年7月10日

Thanks for the response Ben. The camera ribbon cable seems to be ok although I will look to replace it to see if there’s any change. Do you know where the audio chip is on the logic board so I can maybe take a look at the damage of the chip or of the surrounding area?

由 Trevor Smith 完成的 2018年7月10日

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jessabethany @jessabethany

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

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This one is tough because you have two strong possiblities that are unrelated to each other.

Water damage vs common audio ic fault.

We know that iPhone 7/7+ have a board level epidemic where flexion during normal use will tug or pull at the C12 pad under the audio ic causing a poor connection. This manifests in the following ways:

iPhone 7/7+ audio ic fault presentation:

1.) Greyed out voice memos

2.) Caller can't hear you on calls

3.) Siri can't hear you

4.) Various other audio/speaker/microphone-related problems

5.) Long boot time (3-5 minutes)

6.) Long boot loop (3-5 minutes) and fails update/restore with error 4013

7.) Never progresses during boot past Apple logo but is detected as normal by iTunes

All of these symptoms are proven to be associated with the audio ic c12 problem.

A lot of these symptoms are on your list of problems, however audio ic flexion fault is completely unrelated to water damage, and it is unusual for water to penetrate the audio ic area in the iPhone 7.

For water damage only, what is common is "parts problems" bad microphones, cameras, etc, as well as problems where water goes in the iPhone 7, which is:

iPhone 7 water damage hot spots:

Most common--that water never hits the board at all.

After that: Very top of phone, power/vol flex connector

And: Very bottom of phone, backlight/image area.

So what to do?

You need to do what I call "Rule #1" which is put the logic board in a known good housing and see if these problems are parts problems or not. Rule #1 is "You don't have a board problem until you KNOW you don't have a parts problem" Cross that off your list and then the next step is crisp visual exam under a microscope to see if this is likely water damage or audio ic fault.

Good luck!

Jessa of iPad Rehab

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Thank you Jessa! Great idea and I most definitely will try that "Rule #1" first. Hopefully it's not an issue with the board but if it is, do you replace that audio ic or just like desolder and reball it?

由 Trevor Smith 完成的 2018年7月12日

With water damage I would replace it--that is difficult and I recommend all iPhone 7 audio ic work be done on top of a bottom preheater

由 jessabethany 完成的 2018年7月12日

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Also should add that the volume sliders don’t even work on the phone. It’s like the speaker isn’t just not working, but the phone doesn’t recognize that there’s one there. The speaker icon in a phone call is untouchable and in the music app, the volume slider is nonexistent. The volume buttons don’t do anything and in the control center, the volume slider is inactive. — Trevor Smith
Thanks for the response Ben. The camera ribbon cable seems to be ok although I will look to replace it to see if there’s any change. Do you know where the audio chip is on the logic board so I can maybe take a look at the damage of the chip or of the surrounding area? — Trevor Smith
Thank you Jessa! Great idea and I most definitely will try that "Rule #1" first. Hopefully it's not an issue with the board but if it is, do you replace that audio ic or just like desolder and reball it? — Trevor Smith
With water damage I would replace it--that is difficult and I recommend all iPhone 7 audio ic work be done on top of a bottom preheater — jessabethany

Ben @benjamen50 声誉积分: 159.7千 Mtwo Perform 11 191 368 · Answer 1 · 2018-07-10T04:50:54-07:00

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Ben @benjamen50

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Sounds like water got under the audio chip on the logic board. To get that fixed you'll need to take the phone to a reputable shop that does micro-soldering / board level repairs for iPhones.

There are also other parts that are probably corroded / burnt like the front camera assembly for example. If there is any discoloration on the front camera ribbon cable plug end like dark gold instead of the normal bright gold you see on the pins, the front camera probably needs to be replaced.

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