Describes the cause and action for error messages.
does not turn off display
Monitor/display will not turn off Solved - Windows 10 Forums
Change Turn off Display after Time in Windows 10 | Tutorials ...
Monitor won't sleep, screensaver won't come on Solved
Monitor doesn't turn off on its own, and PC won't go to sleep ...
Keep lock screen on (don't turn off display)
FIX: Windows 10 won't put monitor to sleep - Windows Report
Turn off the Display in Windows 10 /8.1 /8 (Screen) EASY METHOD ...
Monitor Wont Sleep Windows 10 Creators Update - GeForce Forums