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iPhone 7 Earpiece not working after screen replacement

Hi, I am fixing an iPhone 7 Plus for a family member and after the screen replacement the speaker does not work. After some troubleshooting I found that in a press a little below the display it works. Well here’s the strange thing. If I record with the front facing camera I get a sound almost like interference or something similar but the audio is still recorded from the mic. Attempting to play anything from the earpiece you don’t hear anything unless you press just below it. I have already replaced the ear piece to no avail and want to try and find the source of the problem. I do know that the display my aunt bought was for the iPhone 7 Plus but as missing all the little pieces at the top of the display were missing. I am wonder if there’s one piece that puts a little but of pressure on the connection pins that makes it contact. Can someone please tell me what I should look for? I don’t want to send this phone back only partly working. While it can be used the person wants to use it as their main phone again.

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Hello

many iphone 7 (i am not sure for 7 plus) suffer of audio disease due to an excessive mechanical fragility near the sim tray. It can create many different troubles such as no microphone, no ear speaker, long boot time etc. The most common failure can be observed with voice memo that is not able to record or play any audio memo. But the symptoms are various.

this failure comes from a break of some join on audio integrated circuit. On a phone i had it was present or nit depending on how i hold the phone at the beginning and then it became permanent.

It seems that it can be present on the phone but not visible until you turn off the phone and restart it, exactly what you do when you change the screen.. And you also practice some mechanical pressure when you plug the screen connector.

Search for audio ic iphone 7 and you will find many subjects and discussion about this failure.

If it is your trouble there are a good and a bad news :

the bad is that it is not a diy repair

the good one is that many microsoldering shop offer this repair service for a reasonable price.

hope it helps

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This is not the case with the phone i am repairing. Everything works fine with the audio on it and i can record in voice memo without a problem. The display was replaced and the earpiece does not work. If i put pressure a little below the display it works. The replacement display my aunt bought did not have the little bits and pieces at the top for the camera bracket and other stuff. Could that be the cause of why it is not working?

par

Most likely not, the little pieces can be removed from the old screen such as the front camera plastic gasket and the proximity sensor gasket.

In short you probably need to replace the front camera assembly.

The problem is most likely a partially torn front camera flex. This is hard to notice but is usually either torn at the solder pads under the black tape for the front camera or where it folds near on the front camera cable.

par

I tried to remove the plastic holders and wish i could find a screen with everything already installed except a home button. I know ifixit has one but 70$ is alot for one. I am wanting to find one cheaper.

par

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sounds to me like the earpice speaker isn't making good contact, it has little conductive springs that make contact with pads on the front camera flex, sounds like its not making good contact.

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It did this with both the new and old speaker. I'm wondering if there's a small piece missing from the top to make proper contact.

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