Audio Systems: Pioneer CD changer, pioneer cd changer, old pioneer

Question
CD's keep cycling thru without stopping. Can't play any of them - they just keep moving.
This is an old Pioneer Cd changer.

Answer
sounds like some mechanisim state optical sensors have failed, causing controller not to recognise disc mechanisim position. if it's more than a few years old, it's more economically feasible just to replace it, rather than face a large service bill. just food for thought....