I got 2 Note 20 Ultra last November 2020 and one of the phones decided to just have a black screen yesterday. Phone is working but it's just not displaying any on screen. Any other experienced this issue?
is the screen black from bootup to shutoff... but you still hear and feel the startup sound/vibration
then it's possible that the screen is dead.
If it's only in certain situations, likely a software issue. if you can manage to get the device on then report the issue to Samsung Members app. if you can't then talk to samsung on the samsung website through their chat