What to Do with a Nonresponsive iPad
If your iPad goes dead on you, the problem is most likely to be a power issue, so the first thing to do is plug the Lightning–to–USB cable (or Dock Connector–to–USB cable) into the 10W USB Power Adapter, plug the 10W USB Power Adapter into a wall outlet, plug the other end of the Lightning–to–USB cable (or Dock Connector–to–USB cable) into your iPad, and charge the battery.
Another thing to try — if you believe that an app is hanging up the iPad — is to press the Sleep/Wake button for a couple of seconds. Then press and hold the Home button. The app you were using should close.
You can always try the tried-and-true reboot procedure. On the iPad, press the Sleep/Wake button on top until a red slider appears. Drag the slider to the right to turn off your iPad. After a few moments, press the Sleep/Wake button to boot up the little guy again.
If the situation seems to be drastic and none of these ideas works, try to reset your iPad. To do this, press the Sleep/Wake button and the Home button at the same time until the Apple logo appears onscreen.