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Screen replaced and now proximity sensor, ear piece & mic not working

Hi all, please help!

I changed a broken screen for a friend on an iphone 7 using a screen complete with digitizer, ear piece, front camera etc from amazon.

The screen works fine but the problems I have are that the proximity sensor does not work, when you make a call you can not hear the other person and they cannot hear you, the speaker button is greyed out when calling and when you try and go onto facetime it just closes itself straight away.

Please Help! Thank you

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Thank you, would this explain the proximity sensor not working either?

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@Tom Matthews Hard to tell without the chance to have a look at what the condition was before replacement, but yes, proximity sensor is a part mainly made of glass and quite easy to break. Double check it's still attached to the flex cable and properly aligned, that's all that can usually go wrong in a replacement.

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A quick update, loosened off the screen and placed a bit of pressure where the audio ic is on the board, while doing this I've made a call and the speaker is no longer greyed out.

Took my finger away and it is still working, for how long it is unknown, but mic and speaker is back, siri and voice memo works, proximity sensor works fine now too

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It was fixed short term, it is now broken again:(

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@Tom Matthews I avoided to sound pessimistic but it's quite clear a rail cannot be fixed by pressure alone, it needs to be rebuilt reliably with a solid jumper wire.

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Most probably nothing that has to do with the screen replacement but with the fall or previous ones..audio IC is a known issue on iPhone 7, plenty of answers on the subject already: https://www.ifixit.com/Search?doctype=po...

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Hi Tom

If there is nothing wrong with the old pieces I would strongly recommend transferring them over (even though it is a bit of work) as they are the original ones and they should work just fine.

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Who ever replaced the screen did not get them plugged in corectly or not at all . Most likely they did not put the cover plate back on that covers the plugs and holds them down ….Take the two screws out on each side of charger port then get a suction cup stick it to the lower side of iPhone and pull the screen up (Watch a YouTube video) they are not glued in so dont heat it up ..Rest assure that is your problem there all on the same plug ..If it was a reliable repair shop take it back to them but as a tech i can say they should have tested that phone hope they did not damage the socket as few are capable of that repair

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I'm guessing the mic that's not working is the speakerphone mic

torn ribbon cable,damaged socket or not plugged in correctly if at all the kind of tech that didn't test it is same type of tech that could be guilty of any of those

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