Hi folks,
Thought mention, had one in for no go. Gather there's a known problem where the control board is suspect, and costs some £80.00 for a replacement.
Discovered resistor (20R) feeding mains supply to TNY253G chip had popped so fitted a TNY254P (much the same but not S/M) and a replacement fusible resistor. There was also a 2/400 reserviour cap replaced that looked a bit suspect nearby.
Up and dehumidifying - well, at least at the present.
Well, it's anything else, and I still need earn the pound - Chris.