Perform a Reset on the iPad (different from just restarting).
Hold down on both the Sleep and Home buttons at the same time for about 10-15 seconds (ignore the red slider button). Keep holding both buttons until the Apple Logo appears. When you see the Apple logo on the black screen, let go of both buttons. This “reset” fixes a lot of iPad issues and might work to resolve the issue you're experiencing.
Article ID: 608
Created On: Thu, Aug 1, 2013 at 10:43 AM
Last Updated On: Tue, Sep 9, 2014 at 4:34 PM
Authored by: Joe Yamada
Online URL: https://kb.nsd.org/article-608.html