Trying to get my autopilot working and between the ST50 Autohelm Navdata and the autopilot they both will not turn on. The previous owner says they both worked a few years ago last time he used the boat. Any ideas where to start? The dealer is pretty pricey here as they are everywhere. Would really like to start learning this on my own incase anything breaks on a trip.
All of the other instruments work except these two.