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iPhone 7 Broken Touch ID Hardware Fixed
Mar 1st, 2017

iPhone 7 Broken Touch ID Hardware Fixed

It is well known that Touch ID chip is exclusively matched with the motherboard. If change a new home button only, the Touch ID function disappears as the unique chip is also changed. So if the home button is unfortunately broken, how can we repair it without losing Touch ID?
Common Touch ID problems include Touch ID fails, and Touch ID not working at all. There are easy solutions to most problems like sweaty finger, wet/dry sensor or other software issues, but quite complicated for broken Touch ID repair. Follow the steps in this post to get your iPhone 7 fixed now!

1.Turn on the phone, unable to activate its Touch ID.

unable to activate Touch ID
2.Go to settings – Touch ID & passcode – enter your passcode, fingerprint is grayed out.

fingerprint is grayed out
3.Take down the home button flex cable.

Take down the home button flex cable
4.Check the home button flex cable under the microscope, we found that the ribbon cable is broken.

Check the home button flex cable under the microscope
5.Scrape the coating off the wire on the ribbon cable with knife.
Scrape the coating off the wire
6.Apply some BGA paste flux and solder the tins with soldering station.

Apply some BGA paste flux and solder the tins with soldering station
7.Scrape the coating off the wire on the reverse side.

Scrape the coating off the wire
8.Apply some BGA paste flux, then solder the tins with soldering station.

Solder the tins with soldering station
9.Cut the wires then align them correctly, heat it up with hot air gun and weld.

Weld the wires
10.Turn the flex cable to the reverse side, weld it with the wire.

Weld it with the wire
11.Test if it is short circuit with digital multimeter.

Test if it is short circuit with digital multimeter
12.Install the home button and test.
Home button testing
13.Apply some UV curable solder mast on the wire to fix the wielding joint.

Apply some UV curable solder mast
14.Install the LCD screen assembly and test, fingerprint works well.

Fingerprint works well
If you are looking for a chip level repairing service for iPhone home button or touch ID malfunctions, you’re in the right place. REWA repair service takes care of all your headaches!

Tools Used:
Mobile Phone Repair Platform
Electron Microscope
Digital Multimeter
Soldering Station
Hot Air Gun
Glass Lens
BGA Paste Flux
Screw Drivers
Tweezers
Anti-static Wrist Strap

Watch the detailed guide video here.

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ONE - STOP ELECTRONICS AFTERMARKET SOLUTION