Symptoms
- Touch input doesn't register at all
- Touch works in some areas of the screen but not others
- Touch is offset from where you actually tap
- Touch worked before but stopped after an update or reconnect
Likely causes
- CommonUSB cable for the touch sensor disconnected or looseTouchscreens typically use a separate USB connection in addition to the video cable, and this can come loose independently.
- CommonTouch driver not installed or outdatedWindows may need a specific driver from the monitor manufacturer for full touch functionality.
- CommonTouchscreen needs recalibrationTouch offset issues are typically fixed by running the calibration tool.
- PossibleDirty or damaged touch sensor layerDebris, moisture, or physical damage to the touch overlay can cause dead zones.
What to do
- Check that both the video cable and the separate USB touch cable are firmly connected.
- Open Windows' 'Calibrate the screen for pen or touch input' tool (search for it in the Start menu) and run through calibration.
- Install the specific touch driver from the monitor manufacturer's support page rather than relying on generic Windows drivers.
- Clean the screen surface with a soft, slightly damp microfiber cloth to remove any film or residue that could interfere with touch detection.
- Try the USB touch cable in a different USB port on the computer.
- Restart the computer after reconnecting cables or installing drivers to ensure everything initializes correctly.
Tools and parts
- Soft microfiber cloth
When to call a pro
If touch remains unresponsive or has permanent dead zones after cleaning, recalibrating, and reconnecting cables, the touch sensor layer itself may be damaged and need professional repair.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.