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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone, iPad, iPod Hardware Repair

iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides.

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Old 10-14-2017, 15:50   #1 (permalink)
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iPhone 6S No touch ID


After repairing an non backlight issue (FL4211) this iPhne 6S is working OK. Only TOUCH ID isn't working... I checked all fuses around J4200, they are all OK. (FL4100; FL4110; FL4112; FL4107; FL4105; FL4120; FL4134; FL4131l FL4130)

Also there appears no message about the TOUCH ID when I start the phone, only if I want to add a fingerprint it results directly in a failure. Can it possibly be U4040 ? (I'am not sure, because I have the possibility to add a fingerprint, but this will result directly into a failure).

Hope someone can help
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Old 10-14-2017, 17:16   #2 (permalink)
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SOLVED:

Seems that some copy screens are not working with iOS 11 . I attached an origional LCD and restored the phone in DFU mode, now the touch ID is working. But if I switch over to the copy screen the TOUC ID isn't working anymore and only working on the origional LCD again after a full restore.

I now used a Tianma LCD, assembly and the touch ID is fine
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Old 10-14-2017, 17:56   #3 (permalink)
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i would be looking for a problem in the flex cable what is under the lcd sheet cover, may be wrongly plugged in, bad backlight with forse touch
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Old 10-18-2017, 21:44   #4 (permalink)
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Quote:
Originally Posted by Tony2323 View Post
i would be looking for a problem in the flex cable what is under the lcd sheet cover, may be wrongly plugged in, bad backlight with forse touch
Good point of view
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Old 04-13-2018, 13:33   #5 (permalink)
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Thank you very much for your experiment I have just done that and it works.


Replaced the Lcd screen for a customer touch id stopped working the next day.
replaced another screen never worked restored the phone did not work.
replaced the lcd screen with original never worked.


Finally with the original Lcd screen restored the phone and it worked.
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