- Garmin fenix 6s pro - screen problems

My Watch screen went competly mad. I could not see anything and it did not connect to computer.

I tried several times. In the end I left it for a longer time and the I could start it. Now I works for a short while 10 to 15 minutes. then the screen starts having lines through it and flimmers in the background.
Anyone had this problem?

Thank you all in advance