Please provide all connection types currently being used. E.g. digital optical cable from cd changer to receiver, etc. Be verbose.
I just got a SONY stereo receiver (model # STR-DH190), and hooked up my 10-12 year old 5-disc player (model # CDP-CE375). The receiver plays FM radio just fine. I also connected an iPod and it works fine with that. But when I try to play a CD, the receiver goes into PROTECT mode and shuts down. Any idea why it works as an FM tuner and plays the signal from the iPod, but won't work with the disc player? Any help would be greatly appreciated.

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