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My Lowrance LMS 520C units keeps shutting down? Sometimes it will restart and stay on for a while ( several minutes) other times it just flashes when I hit power-on and won't light up.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 6 Answers

SOURCE: Magellan GPS Roadmate 760

Try a new cradle many people are telling me the cradle is faulty. You will note the amount of online seller out of stock.

Posted on Sep 29, 2007

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hydetech
  • 113 Answers

SOURCE: I have a Lowrance LMS

Are saying you can't read the screen at night, or is it hard to read the screen anytime?

If you tap the power key, you should here a beep and the screen should get brighter. If you hear the beep and there is no light, then the internal light has failed.

If you can't read the screen in normal light conditions try viewing it under a bright light at various angles. You may notice that the screen is just barely visible. If this is the case you may be able to fix the problem by adjusting the contrast. Try tapping bthe power key and then tap the right or left side of the track pad. It may take several taps to see the results. If left or right doesn't work, try up or down.

Posted on Jul 21, 2008

hydetech
  • 113 Answers

SOURCE: My Lowrance LMS-337c df keeps going crazy.

Normal 0 false false false MicrosoftInternetExplorer4 st1:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}This could be caused by glitch in the operating systemsoftware or by low voltage due to a short in the unit or somewhere in the boatswiring. To troubleshoot the problem Iwould recommend the following steps.

  1. Try a soft reset
  2. If the problem resurfaces, try a hard reset
  3. Update the the operating system software

Soft Reset (Does not delete GPSData)
1. Turn unit OFF 2. Press and holdthe PAGES key
3. Press and hold the PWR key
4. Release both buttons when the USA map
Appears

Hard Reset (Deletes stored GPS Data
such as Waypoints and trails)
1. Back up any waypoints, routes,and trails that you want to save on a blank MMC card
2. Turn unit OFF
3. Press and hold the ZIN&ZOUTKeys at
the same time
4. Pressand hold the PWR key
5. Release both buttons when the USAmap
appears

To update the operating system software, check out this link:
Lowrance337c df update


If you don't have a card reader I can program an update card for you.


Posted on Dec 16, 2008

  • 1 Answer

SOURCE: Cannot access main menu or pages screen

I think I can help with your issue. I have an LMS 334c and have had a few issues in the past. Called the factory (this answer is not listed any where in your manual) and they instructed me to "Soft Re Boot" my unit and it would put everything back to factory settings. Try this anytime it does not respond for whatever reason.

Turn the unit off.

At the same time press the Pages and Power button. Hold both down until you see the square box come up in the screen. You should have your factory settings again. May need to try a few times.
Lowrance said it works just like a computer, ever now and then it just tries to disect to much information at one time and hangs up.
Good luck. James Cantwell

Posted on May 04, 2009

the q guy
  • 393 Answers

SOURCE: Unit powers itself down

does it do this when on battery mode?
or when its plugged in?
i found they do tend to drain quicker the older it gets and that just because of a week internal battery.. i just leave mine plugged in to the cig lighter in my car and i dont have that problem but if you have to use battery power it will drain fast no real fix unless you get a new internal battery and its much easier to just leave it plugged in.

Posted on May 22, 2009

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Won't power up


Make sure the power is good, and the power connections are clean. Check fuses and connections. You can even get a volt meter, unplug the power cable and test for 12VDC across the two bigger female contacts on the power cable connecter. If you are getting 12VDC, then the LMS-520 is bad. If you are not getting 12VDC, then you have a bad power supply, connection, or cable.

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Is online training available for the LMS-520c?


Haven't found any. But the manual covers about everything
http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LMS525CDF-520C_0151-461_120706.pdf

252 pages, you should be able to find answers to any problem you might have with the unit from there.

Sep 14, 2008 | Lowrance GPS

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