Question about Garmin GPSMAP 172C GPS Receiver

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Soon after leaving the dock the sonar goes off and sometimes reads disconnected. Checked all the wires but still no luck. Seems to go off as we speed up. Any ideas? Regards Roger

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My garmin suddenly was doing the same thing. After 5 days of fristration my wife disconnected everything at the unit, as did I many times with no luck, and now it is suddenly working.

We had much rain, it is possible water is in the contacts, but just a thought with that one. My guess is just vibration, and the contacts were loose. Also, make sure your transducer is clean from algae and junk, this will impeded image transmission also.

Posted on Aug 23, 2010

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Posted on Jan 02, 2017

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