Black screen on samsung galaxy 7 edge

[Cindy_4]

I have the new galaxy but the screen keeps going black. I've bought it recently and when I try to use it it does this please help

 

[getochkn]

where did you buy it from? and going black randomly or when you're not using the screen?

 

[Cindy_4]

where did you buy it from? and going black randomly or when you're not using the screen?

I bought it from t mobile and while I'm using it it goes black

 

[getochkn]

bring it back.