1. Install driver software for the first time

2. Every time you change the resolution or display mode of the monitor

3.Every time the display area of the display is changed

4.After each adjustment of the frequency of the controller

5.Check if the touch screen connection is correct. One of the connections to the keyboard port of the host (take 5 volt touch screen working voltage from the keyboard port) is connected, please check the connection

6. If it is not confirmed above, please delete the touch screen driver and restart the computer to reinstall the driver. 3) If the touch screen has been used for a long time (3-4 years) and some areas of the touch screen cannot be touched, the touch screen may be broken. Please replace the touch screen