1. To power on the device, press and hold the Power/Lock key.
   
2. To power off the device, from any screen, press and hold the Power/Lock key.
   
3. Tap Power off.
   
4. Tap POWER OFF.
   
5. If you are unable to turn your device on, plug the device into a power source for 15 minutes, and then try again.
   
6. If you are unable to turn your device off with the Power/Lock key, remove and re-insert the battery.