Abstract: The display control method includes the steps of: making a first determination of whether the analog RGB signal is present or absent, and switching an input to the analog RGB signal and displaying an image expressed by the analog RGB signal when the analog RGB signal has been determined to be present; making a second determination of whether the digital signal is present or absent when the analog RGB signal has been determined to be absent, and switching the input to the digital signal and displaying an image expressed by the digital signal when the digital signal has been determined to be present; and starting a power-saving mode after a predetermined lapse of time when both the analog RGB signal and the digital signal have been determined to be absent.