Hi, Occasionally my fishfinder won't show any depth, and just an error message saying 'No data source' has anyone got any ideas, as I can't find this in troubleshooting.
What one you got? if it is a combo with gps chartplotter, it sounds like you have switched it over onto plotter. switch on, and when it gives you the message go to display button, it will then give you options to switch from one to the other.