HP laptop does not respond, what to do?

I have another technical problem.

So I got a HP Pavilion laptop a month ago. Yesterday I tested the tablet mode for the first time by simply folding the laptop in reverse, so to speak. And when I switched it back to normal laptop mode, suddenly the screen stopped working! I mean I can still move the mouse, but I can't click on anything anymore, I can't open apps or the internet, nor click on the home menu because it does not respond. When I press this Windows Home key on the keyboard, it only works for a short time, and then the spit starts again and I can't click on anything… Did you ever have such a problem? Or. Do you know what you could do there?

What does the manual say, what does the dealer say, what does the manufacturer say?