Hello! Thank you for your question. I am a licensed computer professional with over ten years of experience, and I will be assisting you today.I'm sorry about the issue. Have you tried to do restart the iPad yet: Please press and hold both the Power button and the Home buttons together on the iPad for at least 10 seconds, until the Apple logo appears, then wait a bit, then check.
If needed, please go to Settings -> General -> Sounds, and check.
If needed, please go to Settings -> General -> User side switch to, and check; you can see full details at
Please let me know if there is still any issue. Thank you.
I did the reboot like you said and it is working just fine, Thanks, XXXXX XXXXX caused it in the first place?