Apparatus for controlling the power to units making up and audio/video system

A power control apparatus in an audio/video center for controlling power of other audio/video apparatuses, comprising:

• a main controller for controlling a main operation of said power control apparatus;
• a sub controller for controlling a communicating operation between said main controller and said other audio/video apparatuses, said sub controller passing both connection commands from the other audio/video apparatuses to the main controller and power control signals from the main controller to the other audio/video apparatuses;
• memory means for storing commands and data for operating said main controller and said sub controller and including a non-volatile random access memory for storing data fed thereto after the power to said audio/video center is turned off;
• a display for displaying an image and a message including a control state of said main controller;
• and
• a selector for selecting a signal fed to said display from among a plurality of input signals respectively fed from said audio/video center and from said other audio/video apparatuses, said selector being controlled by said main controller in response to a connection request, wherein upon a connection request from said other audio/video apparatuses fed to said main controller, said main controller determines whether the connection is the same as a previous connection and, if not, after a set time has elapsed said main controller through said subcontroller turns off the power to the previously connected audio/video apparatus.