Question about Garmin FISHFINDER 300C NIC ()

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The boat has been idle for a while and when I pressed the fishfinder unit on the "on" button it showed the screen. When I pressed the "select" button the unit switched off. after reading information that the fishfinder sensor should be submerged, I took the boat into the water and all attempts to restart the unit have failed. I have out of water checked the unit again and pressing the on button the screen has come on. I did not press any other buttons and switched the unit off and awaiting your advice to the problem.

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Hello Alexpreerado,

I understand that you are having a problem with your Garmin fishfinder 300C. When in the water the unit is not turning on, however when out of the water the unit will turn on. I want to see if the unit will work in simulation mode.

To do this you will need to follow these directions:
When powered on select CONFIGURE, SYSTEM, SIMULATOR, ON.

If the simulator works then you know that the unit is working. Then go back thru the same way and turn the simulator back off,

Your unit is equipped with a self diagnostic unit that if there is a problem it should power and give you a fault reading. If the unit is not powering on while in the water you are loosing power to the unit. Put the boat back in the water and check the voltage going in to the unit. You may find that you have a short while the boat is in the water.

Post back with what you find from the above possible solution to the problem. And I will give you some more possible problems and solution to your problem.

Thank you for choosing FIxYa.com

Justinbur167

Posted on May 27, 2011

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