As is often the case, fault finding under the baseboard, is a skill that many modellers wish they didn’t have to develop.
Allan identified a suspect cable and Ray identified a bit of wire, that was securely soldered at both ends but didn’t conduct electricity. The offending green wire was replaced and all appeared to be well.
The track work currently has a short circuit that needs to be addressed by isolating further rails on the point-work. However the DCC controller, pictured, did not prevent the mains block from short circuiting. Fortunately we were using good quality mains blocks that protect themselves under these circumstances.
The only solution was to replace the controller – and everything worked as expected; the controller continued to shriek loudly in response to the short-circuit on the trackwork.
That only leaves the 12 volt auxiliary supply to be connected up – that is top of the list for next week.