When I say entertainment system, the radio/CD player that's factory fitted to the 2006 Sport. The intermittent (90% of the time) fault manifests itself as no audio from any speaker although the radio/CD display stays constant and the CD continues to play albeit mute. Any suggestions as what the fault may be (I'm hoping loose connection but maybe power amp?) and how to remove the unit and possible replacement would be very much appreciated. Thank you!