Just trying to troubleshoot a problem with my Series III.
When I switch on power to the secondary control circuit it trips out the MCB/breaker every time. Primary power circuit is fine.
After some rudimentary tracing today, if I remove 230V power to the control board (wire#202 to J5-2 on the machine control board) then the tripping stops. Plug it back in and it trips. Mostly immediate, but occasionally takes a second or so.

I've stopped checking for today (I'm in the UK and it's cold, dark, and haunted out there now), but first thoughts seem to be a control board failure of one component or another. I'm not an electronics guy in the slightest, so excuse my broad description.

But just wondering if anyone else has had a control board failure, and if so, what were the symptoms? Or is there something else simple I should go and check tomorrow?
I'll say thank you in advance for any help or insight provided