Hi...we have a Beneteau 323 with a ST40 Bidata unit. Everything works fine (speed, temperature, etc.) with the exception of the depth sounder. The display shows horizontal lines only for depth. However, recently it mysteriously started to work as we motored out of port. The depth sounder worked well for about 10-15 minutes until we anchored and shut of the engine, then the display showed the horizontal lines as described above and hasn't worked since.
Thanks for your help.
Thanks for your help.