1. Check to see if your laptop is on and functioning properly.
2. Make sure the touch-screen device is properly connected and powered on.
3. Check the display settings and see if the touch input is enabled.
4. Reset your laptop’s display settings to their default values.
5. Update your touchscreen drivers and ensure they’re the latest version available.
6. Make sure the latest Windows updates have been applied to your laptop.
7. If all of the above steps fail, consider taking your laptop to a technician for diagnosis and repair.