Run Slides or Static Images on a Loop
If your digital screens only need to show a set of images in sequence, this is one of the simplest ways to run them. Slides or static artwork cycle on a loop, and different content can be scheduled for different parts of the day.
Fast food menu boards are the everyday example: one static layout through breakfast, another over lunch, another at dinner, changing on schedule rather than by hand.
The same approach suits anything that changes a few times through the day rather than minute by minute. Your artwork does the talking, and the screens move through it on their own instead of someone standing there with a remote.