Certain aspects of the disclosure direct to a digital signage device capable of entering a diagnostic display mode. In certain embodiments, a signage device includes a display device and a signage controller in communication with the display device. The display device is configured to display media content in a display mode and display diagnostic information in a diagnostic mode. The signage controller includes a processor and a non-volatile memory storing computer executable codes. When executed at the processor, the codes are configured to display the media content on the display device in the display mode, switch from the display mode to the diagnostic mode in response to a diagnostic input command, and display the diagnostic information on the display device in the diagnostic mode. In certain embodiments, the diagnostic information includes system information and content operational and deployment information.