Hello,
Not sure if the subj is representative, but I recently got a Beomaster 5000 that 'just' needed no-load current adjusted in one channel. So it plays fine.
Yesterday i discovered, that when there is signal on TP1 (Cambridge Audio Stream Magic 6) it plays this, no matter which input i select. When PH1 is selected, it will happily play PH1 and TP1 signals overlayed .
This can't be normal behaviour ? I'm handy with both soldering iron and scope and do have the service manual at hand, but could really need a hint as to which direction to look ?