If your touchscreen is not working, here are a few steps to try:

1. Turn off the device and then turn it back on again
2. Make sure that your device is running the latest version of the software and is connected to the internet
3. Check that the display settings on your device are set correctly
4. Clean the screen and make sure there are no obstructions such as dust or dirt
5. Check for damage to the connectors or any other parts of the device