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You can reset your iPad and see if that works or not. Press and hold the Power button and the Home button at the same time for at least ten seconds. iPad will automatically restarts and return to home screen. If it not restarts after holding the button for 10 seconds, hold down the Power button and the Home button until it restart itself.
Let me know if that didn't work, so we can continue troubleshooting. Don't Rate my answer until you are satisfied.