The invention concerns a computer system managing a display device (20), comprising a mother board (1) with processor for managing multimedia functions of the display device (20), a hard disc (30), a first electric power supply member (A1) for powering the mother board (1) and the hard disc (30), an electronic component (40) for transforming data of the mother board (1) into at least one video signal addressed to a video interface component of the display (20), and a flattened removable lid (23) for covering the system architecture. Said system further comprises a software module automatically controlling the display (20), a base support (5) attached to the back of the display (20) and having a matching or substantially flattened shape to be arranged substantially parallel to the plane of the display (20), fixing means (50) being provided on said support (5) to fix the whole set of components of the system.