The screen of my Switch died suddenly ? What can I do ?

Hi everyone

I wanted to play on my Switch, but apparently, the screen decided to die (it didn’t fall, I haven’t knocked it)

I still have the sound, if I connect it to my tv with the dock, I can play normally, but I can’t play handled

Have you got this issue guys ? What can I do before I send it to Nintendo to fix the problem ? :/ maybe I can do something at home ?

I really don’t understand why it died, everything was fine a few days ago