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What to do if iPhone 6S or iPhone 7 Fingerprint sensor Touch ID and 3D not working?

As we know that iPhone 6S, iPhone 6S Plus, iPhone 7 and iPhone 7 Plus (even later new models) has the fingerprint sensor and 3D Touch function, these functions are built in the LCD Panel. Some suppliers only test the LCD display and digitizer touch function, they never test the 3D or Fingerprint sensor touch ID function.

As a result, some repair shops got a big headache - after they install the screen, the iPhone 6S or iPhone 7 Fingerprint sensor Touch ID and 3D not working even if they restore the iPhone for many times.

We did a deep research and found the iPhone 6S or iPhone 7 Backlight was allied with a layer of 3D sensor, and the fingerprint sensor was inserted in the layer. Please check following picture:

iPhone 6S or iPhone 7 Fingerprint sensor Touch ID and 3D not working

This layer looks very thin, just like paper, but it is very important, it affect the gravity sensor and transmission of fingerprint sensor.

If you got one of below problems, you would have to replace the whole backlight.
--Home button not working totally.
--Home button works, but no touch ID / no fingerprint sensor.
--3D not working or 3D is not sensitive.

Here is the link of the iPhone 6S Backlight with 3D Touch Panel
And this is the link of the iPhone 7 Backlight with 3D Touch Panel

Replacing the backlight is easy, you just need solder the new backlight to the LCD Screen. Please avoid the dust goes into the LCD when replacing the backlight.

However, to avoid iPhone 6S or iPhone 7 Fingerprint sensor Touch ID and 3D not working, you should choose a reliable supplier. We have a machine to test all functions. This machine is small but it can test the fingerprint sensor Touch ID and 3D functions correctly. Never miss a bad one.

iPhone 6S or iPhone 7 Fingerprint sensor Touch ID and 3D Testing

Before we ship iPhone 6S or iPhone 7 LCD Screen, we use this machine to test Fingerprint sensor Touch ID and 3D to make sure you receive good screens. This will save you much time and no need to worry anything.

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