I remember that, in the old days, a serious boot error could manifest in a screen like the above.
(I have no idea if this may still happen. I haven't seen it for years, so I assume it is legacy as of UEFI so I chose to asked this question here. Please migrate it if this is not the case)
That screen is not completely blank - it contains a blinking text cursor. This seems to hint that some sort of interactivity was intended, as such cursors commonly appear if the user is expected to type something.
Was it a primitive command prompt? Some sort of low-level BIOS console?
I tried typing random characters, but it did not work. Instead, I had to resort to the power button.
- Was a hard power-off truly the only option when such a screen was encountered?
- If yes, then why was a blinking text cursor put there?
- If no, then how could I interact with this screen?