I'm sorry about the issue. Can you please press and hold (or slide and hold) the power on / off button / switch for about 45 seconds, then turn it back on and check.
If that does not work, please let me know the model of your device.
Please reply at the box below to continue. Thank you.
When you are available, please type at the box below, then click on the Send button below to communicate with me, so I can help further. Thank you.