Question about Lowrance LCX-19C GPS Receiver

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Lowrance LCX-19C GPS Receiver Problem

After being turned on after a few moments the screen begins to get erratic and starts to show inaccurate depths or the screen almost goes black and starts to show 1 or 2 feet of water. It didnt always do this. I tried to isolate the power going to the unit by running directly to the batt. and shutting down the motor. Curious how to find out what is at fault ( unit, trans., trans. cable, electrical or something with way the trans. is mounted). It worked fine for 2 summers then went out to the dock one day and seems to be acting funny.

Any help would be greatly appreciated. Also wanted to know if I could send the unit to lowrance to have it tested.

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  • jburns001 Mar 24, 2008

    Very helpful thankyou

  • Trimix Jun 16, 2008

    I have the same problem. I have used the unit for a few years and all
    was fine until last month. I tried the suggestion you got, but it did
    not resolve the problem. Have you sent your unit to Lowrance? If so,
    was it fixed and how much did it cost?



    Thank you very much!

  • newimage1 Jun 19, 2008

    similar problem with lcx 25c. sonar will randomly work and then cut out, digital depth reads 2.2 / 2.3. screen fills up with yellow/black/blue. the sonar will cut out at all different speeds. tried transducer angle,cleaned connections,shut off all other power, soft reset of unit. i plugged in my other lowrance and had the same problem so i assume it is cables or transducer. no visible signs of scratches on the transducer.

    any suggestions?

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  • 113 Answers

It sounds like you may have to send it out for service, but before you you do there are a few things you can try.

Low voltage can cause erratic behavior. Since you already wired directly to the battery, check the plug for corrosion.

Try unplugging the transducer cable to see if the display still behaves erratically. You wont see depth readings but you should still see the screen going black. If no erratic behavior with transducer unplugged then problem is in the transducer cable or the plug. A common source of failure is at the plug because the added stress of plugging and unplugging cables can cause the socket to twist slightly which can cause a short.

Make sure you have the latest software update.

How to see if your LCX-19C is already using version 1.8.0 software:

  1. Press the MENU button twice on your LCX-19C.
  2. Select SYSTEM SETUP.
  3. Select SOFTWARE INFORMATION.
  4. The software version for your unit is located under the line that says "LCX-19C" (ex. "Version 1.8.0").
  5. If your version is the same version listed above, there is no need to download the software.
If it is lower than 1.8.0 you can download the update from this link: LCX-19C UPDATE
Copy it onto a blank MMC card and install it in your GPS. The GPS should prompt you on how to install the update.

If you need to send the unit in for service click this link: LOWRANCE SERVICE

Good luck!

Posted on Mar 17, 2008

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