What causes this? Display going bad?

[primetime]

After every cold boot up, bottom right corner of screen is very dark.

Unplugging the cable and re-plugging fixes it

Display just going bad?

 

[pendragon1]

After every cold boot up, bottom right corner of screen is very dark.
View attachment 267687

Unplugging the cable and re-plugging fixes it
View attachment 267688

Display just going bad?

the backlight controller/board/thing(cant remember term) for that section isnt powering up properly.