This is a TUNERLESS HDTV monitor. This kind of television was manufactured during the period of time when the HD tuner standard was still being defined. Manufacturers did not want to install digital tuners only to find out they were not compatible with the final standard. Having a cable connection would not provide service. You need to use a cable-system provided decoder box and connect either the HDMI or RCA Audio/Video cables to the Monitor. Then use the cable box to select you channnels.