Try Menu Timeout in settings, can't recall exactly but think that was it. The ones in use are generally on a charger unless someone is away from their desk, and generally that is not more than an hour. Have not received any complaints on the battery life.
I am not 100% positive on the display not turning off now, but I think that menu timeout was the solution.
Last edited by cswroe; 01/22/18 03:52 PM.