Ok this happened to me once and it was because I had to many apps running not the case not dropping it, it was because I didn't quit the apps
Now I know what you are thinking "What? But I push the home button when I'm done" well no, you have to double click the home button and hold down on one of the apps and push the red button on all of them this won't delete the apps just quit because when you push the home button when your done they are still running but if your iPad is under warranty I thinkmthey will still fix it for you anyway drive down to the nearest apple store or computer genius because you can't fix it at home (unless you want every thing erased)
Hope this helped!
Also don't hold down apps on the home page and push the X button
Now I know what you are thinking "What? But I push the home button when I'm done" well no, you have to double click the home button and hold down on one of the apps and push the red button on all of them this won't delete the apps just quit because when you push the home button when your done they are still running but if your iPad is under warranty I thinkmthey will still fix it for you anyway drive down to the nearest apple store or computer genius because you can't fix it at home (unless you want every thing erased)
Hope this helped!
Also don't hold down apps on the home page and push the X button