The amp (Denon PMA-700AE) ignores the signal from the CD Player (Denon DCD-700AR) when the amp has been left idle or on standby for a period. Even after several times of turning all equipment on and off it doesn't seem to clear - very frustrating! Yet come back to it after a day it seems fine!
If you can follow the circuit from the input of the cd play socket inside the amp itself you might come accross a Memory Retention Capacitor that supplies an IC. If you do. I can't for certain say one will be there, I would replace it, it might be the cause of the lost memory of your device.
If you don't know what a M R C looks like, they are like electrolytic types, but haven the appearance of being squashed. The value will be low only 0.22uf etc and the volts very low say 5.5. The PC board marking will be different to a normal capictor.
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