Depth finder comes on then goes off

only suggestions

needs new battery

malfunction of the computer

it seizes up because their is a very hi draw on your battery when the motor is turning over, the starter draws so much power from the battery that it drops the voltage down below what the depth finder needs

My 787c2 screen just shows lines across it does anyone know were to get a new screen for it hummingbird says they don't stock them anymore try Humminbird Fishfinder Depth Finder Humminbird GPS Chartplotters...

print users manual for Humminbird Pironha Max 160 Fish go to this link http://store.humminbird.com/media/document/PiranhaMAX_150-160-170-180-190c.pdf

try Humminbird Fishfinder Depth Finder Humminbird GPS Chartplotters...

Yes... or it is unplugged... or the wire is broken...

Typically you hear a clicking sound at the transducer when it is powered and running but in your case all function is missing from the display and temp and depth is off of the transducer..

Assuming you're talking about a Depth Finder or a GPS... if it's depth finder, I had a similar problem on a Humminbird Depth Finder... the issue was holding down the power button too long. If you push it long enough for the system to light up and let go, it should solve the problem. Holding it down longer takes it into Simulation. Hope that helps.

I've got the 565 and everything will be working fine and then the depth
finder or bottom of the lake goes to 6ft. Have to shut it off for an hour and it works for a wile but it always goes back to doing it
anything I can do?
Thanks Jeff

You can find the manual you need at: http://www.humminbird.com/support/FAQ.aspx?faqid=72

It is listed in the legacy products area with the wide series of units.

hi
Did u bought Humminbird 787c2+GPS or just Humminbird 787c2 ?

If u bought Humminbird 787c2+GPS i like to know, do the built in GPS UniMAP work in australia ? i bought one myself. Thanks.