[TG] [DG11] ACU-400 not detected ('No Pilot' error)

[SaltySeaPup]

Goo day, thanks for your response!

You're correct, the error is not the 'No Pilot', been disconnecting and reconnecting many times so must have gotten confused.

I suspect your diagnosis to be very much on the mark. I am able to get hold of the instruments needed to diagnose and indeed have experience replacing surface mounted components myself. Would there be any chance of conjuring up a schematic for the ACU? I am in dire need of it and there doesn't seem to be any Raymarine technicians up here - sending backwards and forwards to UK would prove to be extremely time consuming.
Greatly appreciate any assistance.

All the best.