First, pull out the refill of the pressure-sensitive pen, gently shake off the pressure-sensitive pen, and then insert the refill again.

Second, I suggest you reinstall the driver. First, uninstall the driver on the uninstall interface of the computer control panel. After uninstalling, unplug the tablet and restart the computer. After restarting, connect the tablet first, and then install the driver. Drivers can be downloaded from official website.

Thirdly, if your computer is a W7 system, you should debug it as follows: a. Right-click "Computer" on the desktop and select "Manage"; B. Select "Services and Applications-Services" in "Administration"; C. Find the service "Tablet Input Service" in "Services" and select "Stop; D. Double-click the service tablet to enter the service, select "Disabled" in the startup type, and then restart the computer to try.