Sometimes the Tablet will freeze when it is left on the same screen for too long. This does not happen often but it can.
When the Tablet freezes the best way to get it back up and running is byholding the power down for 15-20 seconds(until it turns off). The power button is located on the top left (if viewing from the back).
Sometimes when turning off the tablet, the tablet does not fully turn off.
It will show a black screen but if you look closely, it is a black screen that is being lit from behind (the screen itself is projecting the black). This means that the Tablet still has power. To overcome this, hold the power button down again for another 15-20 seconds (or until you notice the black screen actually turn off).
Once you have done thiswait 20 – 30 secondsand then restart the tablet as if you were turning it on normally.