Blank screen 595c

go to settings or set up page and change mode

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

What do you need to know?

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.

Thanks

Joby @ Humminbird

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.

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 ...www.retrevo.com/support/Humminbird-595C-GPS-manual/id/540ag515/t/2 - 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 ...www.retrevo.com/samples/Humminbird-GPS-manuals.html - Cached

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.

You have to order this from the manufacture.

Jerry G.

I have seen a suction cup for the eagle brand depth finders maybe it will fit a hummingbird

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.