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Infos et tutoriels pour réparer l'iPhone 8, sorti le 22 septembre 2017, modèles A1863, A1905.

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Touch ID not working after battery swap

Alrighty, so I had done a battery swap on this phone. Before hand, everything worked and I had checked everything. For the battery swap, I took the screen off just to make sure I don’t accidentally rip the ribbon cables. When I got done, I put everything together and the Touch ID wouldn’t work. What’s weird is the home button would work. I tried reconnecting the screen hoping the connections were off but that didn’t fix anything. I went to the extent of taking the home button off and checking to see if there were any micro tears. I couldn’t see anything that was wrong so I reconnected everything and again, the Touch ID wouldn’t work but the home button would work. I’m at a lost of what could have gone wrong. If anyone has any ideas, please let me know.

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Well usually it's either dislodged or missing components near screen connector or the screen got somehow damaged.

Definitely need to try another screen as this is a common fault that is usually solved by a screen replacement.

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I put a new screen on and it had fixed it. Ill look around the screen connection to see if there is something missing. Thank you!

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What happens when you go to settings and try to set touch ID? I find it really weird that touch ID stopped working but the home button function still works.

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I backed up the phone and did a factory reset. When setting it up it prompts you to use the Touch ID and I would try to put my finger print in. It wouldn’t read my finger but if I pressed too hard it would tell me that I need to press softer. I haven’t tried a new screen but I will try that, I just find it really odd because it is the factory screen and hasn’t been tampered with.

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Update: I put a new screen on it and the Touch ID is now working. Does anyone know why the original screen would eliminate the Touch ID?

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It is not the fault of the screen. There was likely damage to the ribbon cable that you could not see. I have had this same issue with a replacement 7 Plus screen. I suspect the screen was returned but then tested by the seller and showed the LCD/Digitizer were good so they resold it to me. Something was likely pulled or twisted just a tiny bit too much and cause unseen damage.

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Here are my thoughts looking through what other have posted. I ran into an issue where I was working on an iPhone 7 and tore the home button extender cable because the screen slipped on me as I was opening the device. It’s possible that’s what happened here. Was the screen an original part from Apple or was it a replacement? It’s possible that if it was an aftermarket part, there could have been some damaged done already and reopening the device finished it off.

A few other thoughts are pinched cables can sometime cause odd things to happen but it sounds like a new screen solved the problem. There is a lot of room to play with the connectors on the screen on this model but you always need to be aware of how much tension you put on the cables as well.

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I believe it was a bent/pinched cable. The screen that was on it was an Apple screen. I put on an aftermarket one and it had fixed it. Thank you for the insight though!

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Touch flex can be broken while open the phones or possible connector damage,You have to check the screw hole might me problem by long screw.

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Ely Sellin sera éternellement reconnaissant.
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