Hello Marcel! Thank you for your question. I will be assisting you today.I'm sorry about the issue. Please press and hold both the Power (On / Off) button and the Home button (which is located right below the screen) together for at least 10 seconds, until the Apple logo appears, then wait a bit, then check.
When you are available, please click on the Reply to Expert tab below, and reply back to me, so we can continue. Thank you,