In many aspects, a system for a beverage dispenser can include a detector, a touch screen, and a control unit electrically coupled to the touch screen and detector. The control unit is configured to implement a method. In the method, a first graphical configuration is sent to the touch screen for display during an operational mode. A sleep mode is entered after detecting no motion events from the detector after a predetermined amount of time. A second graphical configuration is sent to the touch screen for display or the touch screen is turned off as a result of entering the sleep mode. A motion event is then detected in proximity to the detector, and as a result, the sleep mode is discontinued, and the operational mode is activated, and the first graphical configuration is sent to the touch screen for redisplay.