Marantz cd 17 ki

Mute function can be the problem, but does not have to be the only problem.

To chart the situation:

a) have you obtained it in this state or did it develop the malfunction?

b) after the power on click does it work ok?

c) what are your soldering skills and do you have a scope?

d) could you post some photos of the internals - especially the analogue output stage?