For a few years I used a Sony stereo remote on my LC630. The buttons for the CD player controlled audio CDs in the Mac, the "CD" button launched and quit Apple Video Player, and the volume controls, well, adjusted the volume.
The Tape, Tuner, Photo, and Program +/- buttons did nothing but make a click sound.
The Tape, Tuner, Photo, and Program +/- buttons did nothing but make a click sound.