TURN ON DEVICE: Press and hold the Power/Lock button until the screen lights up. If you are unable to turn your device on, plug the device into a power source for 15 minutes and then try again.
TURN OFF DEVICE: Press and hold the Power/Lock button, then select Power off. If you are unable to turn your device off with the Power/Lock button, press and hold the Power/Lock and Volume down buttons for 10 seconds to force restart the device.