the e-04 error code means that either the disk is dirty or the laser needs to be cleaned. if that doesn't do it, not sure what to suggest. E-02 means no disk is in that spot on the magazine. hope this helps

I have a Sony 10 Disc changer, model # EXCD-3RF, Serial # 22905 that won't play and displays E-04 or E-02. What is wrong and how do I fix it?

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won't record and won't play. error 61.