The touch screen does not work as expected.
Make sure you know how to use the touch screen [Details].
If the touch screen is damaged (scratched, etc.), contact the service/support center named in the warranty.
If the touch screen does not work, turn off your tablet device, and then turn it on again.
If you cannot turn off your tablet device, press and hold the power button for about 10 seconds to force it to turn off, and then
turn it on again [Details].
If you cannot force your tablet device to turn off, insert a pin or other slim object into the reset button hole [Details].