A display device comprising: a display unit comprising a display panel; an audio-video, AV, box configured to form an electric control unit, wherein the AV box has a transmission interface integrated circuit, IC, a controller, a main board in which the controller is loaded and a power supply unit configured to supply electric power; and a first cable configured to electrically connect the display unit with the AV box, wherein the display unit comprises, a source printed circuit board, PCB,, having signal wires for transmitting digital video data and timing control signals being located in the source PCB; a second cable configured to connect the display panel with the source PCB; an interface board electrically connected with the source PCB and having a reception interface IC to receive a signal from the transmission interface IC and transmitting the signal to the source PCB; a third cable configured to connect the interface board with the source PCB; and a module cover configured to cover the rear surface of the display panel, characterized in that the module cover includes an opening exposing at least a first contact point between the interface board and the first cable, and a first recessed area recessed forwardly from a rear surface of the module cover and configured to accommodate at least a portion of the first cable therein, wherein the display device further comprising a back cover to cover the opening, and wherein the source PCB is provided in an upper end of a rear surface of the display panel, wherein the interface board is provided below the source PCB on the rear surface of the display panel, and wherein the first cable extends from a lower end of the interface board through the first recessed area of the module cover to connect with the AV box. a display unit comprising a display panel; an audio-video, AV, box configured to form an electric control unit, wherein the AV box has a transmission interface integrated circuit, IC, a controller, a main board in which the controller is loaded and a power supply unit configured to supply electric power; and a first cable configured to electrically connect the display unit with the AV box, wherein the display unit comprises, a source printed circuit board, PCB,, having signal wires for transmitting digital video data and timing control signals being located in the source PCB; a second cable configured to connect the display panel with the source PCB; an interface board electrically connected with the source PCB and having a reception interface IC to receive a signal from the transmission interface IC and transmitting the signal to the source PCB; a third cable configured to connect the interface board with the source PCB; and a module cover configured to cover the rear surface of the display panel, characterized in that the module cover includes an opening exposing at least a first contact point between the interface board and the first cable, and a first recessed area recessed forwardly from a rear surface of the module cover and configured to accommodate at least a portion of the first cable therein, wherein the display device further comprising a back cover to cover the opening, and wherein the source PCB is provided in an upper end of a rear surface of the display panel, wherein the interface board is provided below the source PCB on the rear surface of the display panel, and wherein the first cable extends from a lower end of the interface board through the first recessed area of the module cover to connect with the AV box.