1. To turn the device on, press and hold the Power/Lock key until the screen lights up.
   
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 15 minutes and then try again.
   
6. If you are unable to power your device off or if it becomes unresponsive, hold the power key then tap Restart. If this does not work, press and hold the Power/Lock and Volume-Up keys for 10 seconds, until it reboots.