Fault · Display and touch
Touch not responding
There's an image, but touch doesn't respond, fails in some areas or registers ghost touches.
View the guide steps online with your BoarDray account.
Covered on 180 models
- Samsung94With guide
- iPad43With guide
- iPhone43With guide
How to approach it
Touch has its own rails (core, I/O and the high scan voltage) and talks to the CPU over SPI or I2C, with an interrupt line and a reset. On the iPhone 6 and 6 Plus the controller is on the board; from the X onward it's in the screen itself and the board only carries its rails and bus through the connector. Always try another screen first.
Other faults in Display and touch
- No displayView fault
- No auto-brightness or True ToneView fault
- Screen very dark or no backlightView fault
Where to find it
- By modelEach model lists the guides that apply to it.
- By familySamsung, iPad, and iPhone already have the guide.
Models where it is covered
Samsung · 94 models
iPad · 43 models
iPhone · 43 models
See inside every board
Sign in to open the Touch not responding guide next to the schematic and board view.