Describes the cause and action for error messages.
does not turn off monitor
Monitor/display will not turn off Solved - Windows 10 Forums
Monitor won't sleep, screensaver won't come on ...
Monitor doesn't turn off on its own, and PC won't ...
FIX: Windows 10 won't put monitor to sleep - Windows Report
windows 10 - Monitor will not stay off - Super User
Monitor Wont Sleep Windows 10 Creators Update - GeForce Forums
Monitors won't go to sleep... Why? | TechPowerUp Forums
After Windows 10 upgrade, no screen saver or sleep - Forums - CNET
Configure Display Off Time in Windows 10 - Winaero