Cant unlock device settings

[Android Central Question]

I can't make my tablet stay on,so it turns off not even 10 seconds and when I tap into my settings I could only ajust in how bright I want it to be as for the sleep part it's there and could see it in a very light color as if it's locked and don't know how to unlock it

 

[B. Diddy]

Welcome to Android Central! Which tablet?