Great question — answering as the UphillTech team:
I solved this on a server using setterm . The problem with this solution is that I can only turn the monitor back on (restore the display) via SSH or by performing a cold boot. Give it a try, maybe this solution works for you, and you can tweak some other settings if needed. See How can I turn the screen back on using setterm or another command, only with the core utilities over ssh? The salient points are these: I turned off the screen using setterm --blank force on the device itself, and now I can't turn it back on by pressing a key because force causes keyboard input to be ignored. To turn the screen back on after it has been turned off with setterm --blank force , you can use the...
Full answer by Zero Flow Operations: https://unix.stackexchange.com/a/807661 (CC BY-SA 4.0).
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