S21 ultra black screen

[nagynegm]

My Samsung S21 Ultra screen suddenly blacked out and I cant reboot the phone but it still receives phone calls and I can answer by touching the screen.

What it the solution for this problem knowing it happen on many recent devices. 

[محمود_فرج]

Type s21 ultra black screen on YouTube you will get the solution

[nagynegm]

Didn't work out