Fault · Biometrics
Touch ID not working
It won't enroll fingerprints or the Home button doesn't respond.
View the guide steps online with your BoarDray account.
Covered on 25 models
- iPad16With guide
- iPhone9With guide
How to approach it
The fingerprint sensor (Mesa) is in the Home button and is paired to the board: a button from another iPhone works as a button (on some models) but doesn't read fingerprints. Mesa gets its own high voltage (about 16 V) from a boost, its 1.8 V and 3 V rails, and talks to the CPU over SPI or I2C with an interrupt.
Other faults in Biometrics
- Face ID not availableView fault
- Fingerprint sensor not respondingView fault
Where to find it
- By modelEach model lists the guides that apply to it.
- By familyiPad and iPhone already have the guide.
Models where it is covered
iPad · 16 models
iPhone · 9 models
See inside every board
Sign in to open the Touch ID not working guide next to the schematic and board view.