Try reinstalling the touch screen driver to ensure proper connection.

This may be a hardware issue with the screen. Contact the manufacturer for repair or replacement of the screen.

Minor scratches can be repaired using screen repair tools, while severe scratches may require screen replacement.

Check if too many programs are running, or try cleaning the screen and updating drivers.

There may be an error in color calibration. Try adjusting the color options in the system settings.

Check if the power is connected properly and if the power switch is working properly.

The screen may have local damage and requires repair or replacement of the touch layer.

Possible signal transmission issues or unstable power supply, check the connection wires and power supply.

Check if the resolution setting is correct or if there are any stains on the screen surface. Wiping it clean may improve the situation.

It may be a touch calibration issue, try recalibrating the touch function.