Hello Matthew! Thank you for your question. I am a licensed computer / tablet professional with over ten years of experience, and I will be assisting you today.I'm sorry about the issue. Please try this: press and hold both the Power button and the Home buttons together for at least 10 seconds, until the Apple logo appears, then wait a bit, then check.
Does that work? Please click on the Reply to Expert tab below, and reply back to me, so I can help further if there is still any issue. Thank you very much.