Question about Lowrance LCX-18C

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Repair for lcx-18c

On a recent fishing trip I noticed the unit got very hot. Smoke was coming from the inside. I quickly unplugged it, but damage had been done. Since I know a little about electronics, I opened it up to look at the damage. There is a large coil  next to an electrolitic capacitor (100V 3300mf) that is fried. One lead is no longer attached to the board. A diode, which I'm not sure where it came, became so hot it was actually indented in the back of the plastic cabinet. What can I do? Can I send back to you for repair. I love the unit, but there is a limit to what I can spend to fix it. Please let me know what I need to dol




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Re: Repair for lcx-18c

Unfortunaley i have a problem with mine also. I contacted Lowrance, and they no longer support or repair this unit.

Posted on Dec 30, 2008

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Comes on white screen then off just for a second

If possible, try to restore the device to the newest firmware on it using your computer using this firmware:

Do a soft reset. This may resolve your issues and will also keep your data on the device.
Do a soft reset by:
1. Having the device already off
2. Press and hold the PAGES key
3. Press and hold the PWR key
4. Release both buttons when the USA map appears

If neither of those work, try a hard reset. This will however delete all stored data off your device.
To do a hard reset:
1. Have device off
2. Press and hold the ZIN&ZOUT Keys at the same time
3. Press and hold the PWR key
4. Release both buttons when the USA map appears

If none of these work, contact Lowrance at 1-800-628-4487

Mar 05, 2011 | Lowrance LC X-18c GPS Receiver

3 Answers

When turning on the Lowrance the depth indicator will only register 0.0 and continues flashing the number. The Lowrance is a LCX-17M. We tryed the Lowrance on another boat with a working transducer...

here is the link to your the lowrance web site. the trouble shooting guide says that if you tried to it on another boat than you might need to take it in for service. but there is a section that explains how to do a soft reset on the unit. you might try that.

please rate and comment on your experiance with fixya.

Aug 15, 2008 | Lowrance LCX-18C


Lowrance LCX power up problem

On Lowrance LCX-19 and I would assume other LCX series units.
The T3 Transformer shorts out and when the sonar kicks in it causes the unit to go over current and will eather cause the unit to reset and start again or blow the fuse. If you have the ability you can re-wind the transformer.

The primary is 46 turns of 24awg inverter duty magnet wire,
The secondary is 164 turns of 26awg inverter duty magnet wire.

Be sure to keep the same winding direction as what you take off as it may be phase sensitive. Be sure to use mylar tape between the primary and secondary windings.

Just a note this board has very heavy power planes and is very hard to solder/de-solder on.

If you have any questions or need help you can contact me at

on Jul 20, 2010 | Lowrance LCX-19C GPS Receiver

2 Answers

LCX-25C seems to be cycling on & off when in the sonar mode.

Did you ever get your problem fixed, I having the same issues.

Apr 17, 2009 | Lowrance LCX-25c GPS Receiver

1 Answer

I have a lcx 28c hd fish finding sonar and mapping gps

I've had several similar units, and used them with Navionics HotMaps Premium series chips. You must select Menu. The "Browse files" to access the MMC card option. Once the selection screen opens, choose which card or file you want.

FYI...All of Lowrances HD models come preloaded with pretty much every major lake and river in the US.

Lemme know if this helps...

Mar 23, 2009 | Lowrance LCX-27C GPS Receiver

1 Answer

Stops on boot up

I downloaded an updated version of software from lowrance. Once i installed the software it came back working like new.

Dec 30, 2008 | Lowrance LCX-18C

1 Answer

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.
  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!

Mar 15, 2008 | Lowrance LCX-19C GPS Receiver

3 Answers

LCX-19C - Screen displays backwards

I have the same problem on my unit and was told the same after I stayed on hold 38 minutes for tech support at lowrance. This is the second Lowrance that they would not fix and only offer a "discount" on a replacement. This company can KISS my behind. What a scam!!!

Aug 04, 2007 | Lowrance LCX-19C GPS Receiver

2 Answers

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.

Nov 15, 2006 | Lowrance LCX-19C GPS Receiver

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