multiple simultaneous touches are not recognized
If the live test passes, the investigation can usually move away from total hardware failure and toward the affected app, permissions, routing or configuration.
Try the simple causes first
- 1
Run the DeviceOK touch test and identify whether the issue affects the whole screen or a specific region.
- 2
Clean and dry the screen and remove accessories that may interfere with touch.
- 3
Restart the device and retest before changing advanced settings.
Work through the problem in order
- 1
Run the DeviceOK touch test and identify whether the issue affects the whole screen or a specific region.
- 2
Clean and dry the screen and remove accessories that may interfere with touch.
- 3
Restart the device and retest before changing advanced settings.
- 4
Compare the behavior in another app or system screen.
- 5
Use the device maker's built-in diagnostics where available.
- 6
If a consistent physical area fails across apps and diagnostics, seek manufacturer/repair support.
If the touch passes the DeviceOK test, prioritize the affected application, permissions, routing, or configuration before assuming the hardware is dead.
If the touch also fails in DeviceOK and another trusted app, broaden the diagnosis to connection, OS settings, drivers/firmware, and then possible hardware failure.