Hi I recently purchased a S3 with a bose concert stereo and 6 disc multi-changer. When I was buying it the guy said there was a problem with the cd player though he didnt know what. The problem seems to be that the cd changer is connected to the head unit but when you press the mode button to select the cd player nothing happens. It seems to me (though I am a bit of a novice with these things) that the cd player isn't getting recognised at all as if it was some sort of cd error would be shown. Can anyone give me any tips where to start investigating this problem?