1. To turn the device on, press and hold the Power/Lock key.
   
2. To turn the device off, press and hold the Power/Lock key.
   
3. Tap Power off.
   
4. Tap OK.
   
5. If you are unable to turn your device on, plug the device into a power source for 20 minutes, and then try again.
   
6. If your device becomes unresponsive, press and hold the Power key for 10 seconds, until it reboots.