Sounds like the DAC is not "locking" onto the output from the transport. Maybe the Marantz is shuting off the digital output after a period of time. Turning off , then back on, resets the digital out. Could also be that the transport is outputing a signal, but the DAC isn't locking on. Have you tried a different input on the DAC from the transport? You'll need to troubleshoot a little further.
No sound from cdp.
I have a Marantz cd5001 I've been using with a CA Dacmagic. Recently, on occasion, I'll get no sound. I have sound from my computer, and from my tuner as well. When I click to digital 1 on my dac, I notice sometimes there's no signal coming from my cdp. Of course I also have no sound. If I take things apart, or shut it down completely, it usually comes back on. This is getting frustrating though. So I'm asking for some advice. New cdp (transport)? Or do I need to look at something else? Any and all responses are appreciated.