My tablet is freezing but I can still hear the sound when I turn it off but I can't touch the screen

[Lan VY]

My tablet is freezen but i can still hear the sound when i turn is off but i cant't tuoch the screen

 

[Saga Lout]

Is there any sign of damage to the screen? Trying turning it on and stroke the screen from left to right a little way down from the top. That's where the Briightness setting can be adjusted.

With a bit of luck, you've turned it right down so you can't see the screen and if you stroke to the right you might hit the right spot to increase the brightness.