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Blank screen 595c

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My unit allways stay in simulation mode how to start it working

Start-Up Options Menu
Press the MENU key when the Title screen is displayed to
access the Start-Up Options menu.
Use the UP or DOWN 4-WAY Cursor keys to position the
cursor, then the RIGHT Cursor key to select one of the
following choices. If you wait too long, the system will
default to whichever menu mode happens to be highlighted:
• Normal
• Simulator
• System Status

Feb 27, 2014 | Humminbird 595c GPS Receiver

1 Answer

I just installed a 595c gps on my boat. I used it the first time with no problem. The next time I went out, it would not start up. The power comes on but only 2 symbols show up on the left hand side of...

If you know of someone else that has the same setup on there boat you can slide your unit on there mounting system and see what you get. This will tell you if it is the unit or the transducer. I would check my voltage to make sure you have 12 volts at the end of your power cable. If you do not know of anyone with the same setup you can contact our Customer Group and they will be glad to help you out. There number is 800-633-1468.


Joby @ Humminbird

Jan 04, 2011 | Humminbird 595c GPS Receiver

1 Answer

My 997c has a low voltage message on the screen every 20 minutes.

When you have a low volt warning, it is simply because you have low volt. To confirm this use a multi-meter and check the voltage at:
A- the power connector for the GPS
B- the battery directly.
If A is bellow 10.5 V and B is above 11,x you have a cable problem (long or/and thin cable). If they are more or less the same, but bellow 10.5V you need to check your electric system.

Oct 23, 2009 | Humminbird 595c GPS Receiver

1 Answer


hello there:
here is a few links that have the manual that you can download for free
  1. Humminbird 595C Manuals, Support and Troubleshooting - Fishfinder GPS Free download of Humminbird Fishfinder 595C User Manual. ... Humminbird Fishfinder 595C GPS. Need a manual? HUMMINBIRD 595C MANUAL - 96k - Cached
  2. Humminbird GPS Manual and Support Information: User Manuals: Retrevo ... largest collection of user guides and manuals on the web. ... Humminbird Fishfinder 595C. Operations Manual. Humminbird HDR 400G. User Guide. Humminbird HDR 400I - Cached

Sep 16, 2009 | Humminbird 595c GPS Receiver

1 Answer

Cant see my screen on my humminbird fish finder any more

The most common failures:
It may be the power inverter board, and or the backplane lamps, or the screen, or the screen driver board.

The unit will have to go back for factory service. They will use board substitution to service it. Once the defective board(s) are determined, they will leave the new board(s) in the unit.

Jerry G.

Jul 26, 2008 | Humminbird 595c GPS Receiver

1 Answer


You have to order this from the manufacture.

Jerry G.

Jul 25, 2008 | Humminbird 595c GPS Receiver

1 Answer

Low Voltage

The power inverter board is most likely starting to fail. The unit should be sent in for factory service. They will change the board and test it out to make sure that another board did not cause the fault.

Jerry G.

Nov 13, 2007 | Humminbird 595c GPS Receiver

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