Glad you fixed the jumper problem - I have one of my BM 5000s wired with simple RCA cables, the others have the jumpers as shown in the photo. The purpose of this setup, is to be able to interface an equaliser between the pre-amp and the power-amp should you want one (and no, there was not a 5000 equaliser made by B&O).
georganic wrote:
When I plug my Denon CD player into "line in" with the RCA jacks, it sounds great. It doesn't respond to the MCP, but I assume that is because of the RCA connections, instead of the 7 pin DIN.
There are control signals sent on the DIN cable as part of a protocol called DATALINK; I doubt that the Denon will respond to those.
The CD50 of course does respond to these commands, including skimming for track selection (or exclusion); however CD50s do age.
I think you may have to disassemble the Beocords to see what has happened. You will find lots of instructions and photos on how to do that in old forum threads.