Macbook Pro horizontal black/white lines

I'm trying to help my friend.

The problem with the Macbook Pro is that it suddenly got white/black horizontal lines that changes over time. Example it goes up and down, and sometimes disappears and the whole screen turns black. We tried PRAM and SMC reset, that made the screen brighter (white) but didn't fix the problem.

Type.

Macbook Pro 13'' late 2015 edition.

Image of the problem.

https://imgur.com/a/ttKKmUn