Just discovering this after two months. This thread has given me some great ideas and is sure to keep me busy with my HA setup for a while. Thank you everyone 🙂
It's an energy saving device from 1993 which connects inline with the monitor's power cord, and also inline with the keyboard. It cuts power to the monitor when no keyboard activity is detected for 10-42min (Adjustable with DIP switches)
Could you please share a link to it?