Question about Humminbird Fishfinder 565 With Transom Mount Transducer

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My 565 has power but it will not turn on - Humminbird Fishfinder 565 With Transom Mount Transducer

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  • Anonymous Apr 26, 2009

    i have the same problem

  • shelbydogge May 07, 2009

    I have same problem.  I have 12v at the wire that connects to the power head.  I took the power wire out of the bracket just to be sure it made good contact &  plugged the wire direct into the unit.  Nothing happens when I press the on button.  The problem must be in the unit itself.


  • Anonymous May 15, 2009

    I am having the same problem. I bought a new readout and it still doesn't work. I have full power to the unit but doesn't turn on.


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You guys will need to take the ounder to a Humminbird service center and have them check the poswer circuit. More times than nor we see blown circuits (usually easily fixable by a competent repair depot) because of no inline fuse or too large a fuse rating. Max should be 3 amps for this model.
Best of luck!

Posted on Sep 27, 2009

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I am having same problem with mine. It won't power on. Was using it while fishing and it went off and stayed off. Can't get it to come on again.

Posted on Jul 25, 2009

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I had the same problem happen twice. Both times happened while sitting in the sun for an hour or so with power applied. I was lucky that the first time it failed it was still under warranty. It lasted over three years then it happened again. I opened it up and replaced a 10 cent component that was used to repair it the first time. ( I noticed the crappy soldering job the repair folks did) and the component looks bulged/damaged. (Viewed under a microscope) replaced the part and now it powers up. I'll try it out on the lake soon.

Posted on Sep 08, 2011

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I had the same issue. The repair shop told me it's most likely the "boost circuit". Unfortunately I can't find this circuit new, to replace the old, blown one. Must send unit itself to the shop and pay the $60-$80 Cdn to have it much for DIY !

Posted on Aug 26, 2010

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Posted on Jan 02, 2017

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