Humminbird 1198c si sonar and loading issue - Need Help

[borderc21]

I am new to Humminbird and bought a '10 Skeeter this year that has a 1198 at the console. About a week after having it I would hit a wave and the power would cut off so I read on hear about the pin issues and fixed that problem. After a week or two I then started having problems with the unit booting up. The unit would make the power on sound every time but it would never display the loading text or advance any further, it would just be black. After cutting the power off and unplugging the unit, I powered it back on and noticed that it had loaded up but you had to look really really hard to even tell something was on the screen. After cutting the power on and off a few times it came on full strength and stayed that way the rest of the day. Now I have no sonar. The display of the regular sonar shows like the you are in 0 ft of water but the digital read out shows crazy readings like 1175ft and bounces all over the place. I thought I had a bad transducer so I replaced it and it is still doing the same thing. I reset all settings to factory and it didn't change anything. The SI will display sometimes and then other times it will not show at all. When SI does display you can at least see depth based on the bottom couture but the image itself is really poor.

Items to Note:
Wired to cranking battery
Voltage is 12+
Backlight is 10
Factory Reset

Any ideas?

 

[Hook1]

May just have to call Humminbird and send it back. Sounds like internal circuitry problems.

 

[porthos33]

Yeah thats a weird issue. If hummingbird had to send you a refurbished unit it would run $490.00 on that unit.

 

[borderc21]

So I did some more digging around tonight and found that there is a AS SIDB Y cable that is hooked to a transducer in the bilge area and also to a Duel Beam HD transducer that is mounted on the jackplate. When I reset everything to default, did I change a setting that is now causing the sonar to not read at all?

 

[frazier2209]

My suggestion would be to find a friend with a HB core series unit and plug your graph up with their wiring and see if the problem persists. This will give you a lot more answers.

If it has to go back to HB, that's not the end of the world. Good customer service and fast turnaround!

 

[MarkTn4]

I had an issue with mine powering on and off by itself. I updated the software from humminbird's website and it fixed the issue. Its been years ago but it might be worth making sure you have the latest update on your unit before spending more money.