Question about Lowrance LCX-19C GPS Receiver

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LCX-19C - Screen displays backwards

The screen displays backwards/inverted. Everything is upside down and inside out. Thanks for you help...Pat

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Re: 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!!!

Posted on Jun 06, 2008

Re: LCX-19C - Screen displays backwards

I too suffered the upside down inside out display issue. Lowrance told me to give the back of the unit a whack. Since no one would repair it, I had nothing to lose. It worked! It may only last a day it may last a week then you have to whack it again.

Got tired of doing that so I took the unit apart (T-9 Torx driver some may have the tamper-proof screws) and found a little black ground wire at the very top of the assembly that connects the pc board with the display module had broken and was making intermittent contact. I believe that's why when I'd give it a whack it would work for awhile and then go inverted again sometime later. I replaced that wire making good soldering connections on both ends and so far so good. Can't say for sure this is the ultimate fix or that your issue is the same but it's worth a shot. Beats shelling out another grand! Good luck.

Posted on Sep 10, 2008

Re: LCX-19C - Screen displays backwards

I had this problem on my 19c screen just recently. I could atually touch the screen and it would go back to a normal view. Touch it again and it wopuld reverse and invert. And then... my screen started to look like a tv with a horizontal hold problem with multiple fluttering images. And I couldn't get this problem to go away. I called Lowrance earlier today and they don't service these machines anymore and won't give you the name of a repair center. The best I could get out of them was a $250 rebate toward a new lcx 27 machine. Not much for an $800 machine that was 3 years old. I'm afraid to say that your machine is likely going to get unusable with a probable display issue.

Posted on Sep 26, 2007

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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

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The LCX-27C will draw up to 1.5 amps when powering up, if that amount of current is now available, it will power down. Double check your power connections. The +12vdc supply must be able to also supply enough current. Once you get it to stay on you can temporarily shut off the transducer by going into full mapping mode, or switch it to sonar simulation and the current draw will drop considerably. When you are ready for the permanent installation run solid connections directly to the battery and be sure to use the inline fuse for protection.

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Are you utilizing another unit in your dash? If so, sometimes when both units are on and in sonar mode, their frequencies will intefere with each other causing the vertical lines. I would suggest turning your dash unit off or lowering it's Hertz rate from 200Hz down to 50Hz.

Funny story...I saw this same issue on my boat years ago. I had an X102C up fron and an LCX-19c in the dash. I acutally thought it was some sort of man-made structure and spent time fishing it...DOH!

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Jun 11, 2008 | Lowrance LCX-19C GPS Receiver

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Setting a waypoint, I do not have the altitude and the lowrance will not enter the latitude and longitude, what do I do?

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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!

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