Hi Phil, Dave
I have not changed my chartplotter since the time when the autopilot used to work. So i assuming that the chartplotter is not the guilty party.
I have checked all the wiring I can access. I don’t think there is an extraneous ferrous item (handbag or otherwise!). So I am puzzled.
I know that the fluxgate compasses do tend to fail so i worried about that. I am not sure how to test it. Ideas welcome!