Question about Lowrance M68C GPS Receiver

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Lowrance m68c not powering up and cloudy screen

The unit is powered by a 12 v sealed battery. The unit will power up for a couple of seconds then shut off. While on the screen has a large area that is darkly cloudy. I rotate 2 batteries and they both are charged. The company said it won't repair the unit simply because it is older than 5 years old. I think the unit is 6 years old.

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Posted on Jan 02, 2017

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SOURCE: powerin up - screen goes blank after a few swconds -

had same problem. the cause was corrosion in the boat wiring. the power wire was corroded 95%thru. there was enough voltage to start the unit but when the sounder kicks in the voltage dropped below minimum and the unit shut off. took a LOOOONG time to find.

Posted on Jan 10, 2008

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hydetech
  • 113 Answers

SOURCE: Lowrance LCX-19C GPS Receiver Problem

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

  • 1 Answer

SOURCE: Lowrance LCX-16ci - screen's gone out

I have a working unit with a bad antenna. Interested?
Davidwcantrell@comcast.net

Posted on Aug 07, 2008

  • 1 Answer

SOURCE: i have a lowrance lms332c

try to hold in the page button and power button at the same time to reboot your unit, But you may or may not lose waypoints,

Posted on Aug 12, 2008

  • 1 Answer

SOURCE: Power to Lowrance GPS

Hi,

Yes you have to hook up the red wires together to the + and both black ones to the negative, otherwise the antenna won't be supply in current , and don't forget to insert behind the red wire a fuse and a switch to avoid to discharge your battery .


Bernard.

Posted on Apr 26, 2009

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Sounds like the power button is pulled loose from the circuit board or the power switch went bad for some reason. You can't check this out as it is sealed to be waterproof and opening it violates the warranty. The only way to address this would be to send in to Lowrance Customer Service.

This should not be a common problem and should be covered by manufacturers warranty if still within the 1 yr warranty period. If out of warranty, Lowrance Customer Service should still be able to replace or repair it for some sort of cost.

To speak with US based Lowrance Customer Service, call toll-free at 1-800-324-1356, Monday through Friday from 8:30 am to 4:45 pm Central. Or email them at products@lowrance.com with problem, product model and serial number (located between the batteries in the battery compartment). CS On Hold times range between 0 and 4 minutes right now with Monday mornings being their busiest times.

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during this time press in on the power button for 2 minutes and if it has a reset button it press in on this for 2 min leave the battery and the power out of the unit for the rest of the remaining time i had mentioned.
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Powerin up - screen goes blank after a few swconds -


had same problem. the cause was corrosion in the boat wiring. the power wire was corroded 95%thru. there was enough voltage to start the unit but when the sounder kicks in the voltage dropped below minimum and the unit shut off. took a LOOOONG time to find.

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