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A trick that I have found with the marine Furuno products is that they remember the state that they were in the last time power was removed from them.
In the unit is off when you remove the AUX power than when the AUX power is turned back on the unit will remain off.
If the unit was on when the AUX power was turned off then the unit will be automatically turn on when power AUX is turned back on
This feature keeps the unit alive if power is disrupted under way so that the helmsmen doesn't have to keep turning it back on during busy times.
perhaps someone has messed with your sounder settings. You may want to factory reset the sounder from within one of the menus in your navnet. Also you may have a transducer going bad. Did you hit anything with it or run aground once? Maybe someone painted over the face of the transducer with bottom paint. There's alot of things that can cause this to happen. It would be best to have the sounder checked out before you do anything to the ducer. Remove your navnet and sounder and take it to a dealer to test on the bench. If you're in the maryland area, Mid-shore Electronics and handle this for you. Even if you're not, you can send the units to them.
Hi! Please go into the menu and select the 'Nav' tab then choose the 'Chart Orientation' setting and set to 'North - Up', also make sure 'North Reference' is set to 'True'. If that doesn't work, reset the sounder back to factory defaults and try again. Here's the manual to you sounder: 947C Manual
This may help. Mine has the GPS antenna build into the bracket at the back. I removed the bracket and the unit did not go into the error screen and the sounder worked fine. The GPS would not locate but it has not antenna attached so DOH!! I have orderd a new antenna with the BNC connector and will post if that fixes the problem. At this point I'm guessing its a blow GPS antenna.
We have an old Hummingbird Depth Sounder (Wide 100, 94 model) and it turns on but must be on test mode or smething cause we can not get it off. Does anyone know or have a manual to solve this problem. Please help.
I had the same problem and contacted Garmin. This is being caused by a software issue that started when the government updated the software in their WAAS satellites. The Garmin website will give you instructions on how to correct this but I have listed them below:
Power on unit
Press enter to get past the I Agree screen
Now you should be on the satellite page, press the menu button one time
Highlight WAAS off and press enter
By doing this, the unit should not shut down.
I followed these instructions and my 168 Sounder is working fine.
Depth: Could be for a number of reasons, too deep for the sounder - check the manual for it's max depth. Dirty water, sounder unable to penetrate through to the bottom. Weed or other debris covering the transducer. Transducer on a swing mount & being pushed out of alignment then dropping back in once stopped.
Speed: Is the speed readout controlled by a GPS or paddlewheel? If it's GPS, check the power connection of the sounder, may be loose which would also cause the depth to 'drop out'. If it's paddlewheel, you're down to bad connections or faulty unit.