The display shows Source, then ----, then something else. No NL.

If I switch off, or disconnect the cable, from the partner the "putt...putt" sound stops - no signal through the cable, I guess.

To use D2 input the manual says Type 5, but not sure whether that's going to be compatible with my Type 6 speaker setup?

I need to get a source with a digital output to test the cable/input card on the speaker. It could well be the output of the master that has failed...