Many issues that cause your iPad not to respond correctly can be cleared up with a few troubleshooting steps. The easiest thing to try is a reboot. Which basically turns your iPad off and back on.
If your iPad does not respond at all;
Press and hold both the Sleep/Wake button and the Home ￼button for at least ten seconds, until the Apple logo appears.
Note: If you are not sure it has a charge, connect the power adapter.
Restoring your iPad
When you restore your device, the latest version of iPad software is reinstalled, settings are restored to their default, and all data stored on iPad is removed, including downloaded apps, songs, videos, contacts, photos, calendar information, and any other data. However, If you’ve backed up your iPad with iTunes on your computer, you can restore data from the backup at the end of the restore process.
Since restoring reinstalls the latest iOS software, it normally clears up any bugs related the operating system. It is also the most lengthy step. You can expect 10 – 20 minutes for the software to download and another 10 – 20 minutes to reload your content from a backup.
You should also sync your iPad before you restore. Syncing will transfer any content and setting to iTunes that can be reinstalled to your iPad after the restore.
How to Restore your iPad