Gps moduel not responding on Lowrance Lcx- 28c hd

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

I have a working unit with a bad antenna. Interested?
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SOURCE: Lowrance LCX-15MT Ihave used this

Go to lowrance's website and run through their set up tutorial / instructions for the unit, there is also a software upgrade you can do online for the unit.

SOURCE: need a manual for my lowrance lcx marine gps combo

You're in luck! Visit => http://www.lowrance.com/en/Downloads/Manuals/

There are 3 manuals (pdfs). The first is the manual, the next two are addendums.

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX-15MT_0133-49.pdf

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX15_0133-70_add_031402.pdf

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX15_0133-71_add_032802.pdf

Please leave feedback. Thanks in advance.

SOURCE: need manual to download

You're in luck! Visit => http://www.lowrance.com/en/Downloads/Manuals/

There are 3 manuals (pdfs). The first is the manual, the next two are addendums.

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX-15MT_0133-49.pdf

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX15_0133-70_add_031402.pdf

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX15_0133-71_add_032802.pdf

Please leave feedback. Thanks in advance.

SOURCE: lcx-15ct (gps module not responding)

Before you give up on the LGC-12S you have now though, try plugging the LGC-12S right into the LCX-15CT without an extension cable. If the module not responding goes away...you just need a new extension (GPSX-25G p/n 99-46).

The power cable has a set of yellow, blue, orange, and bare data wires. If these wires short together, you can get the module not responding error.

If all that doesn't help...the LGC-12S is bad.

The LGC-12W p/n 112-06 will work with the LCX-15CT. You probably get this at many marine electronics dealers or go to lei-extras.com and buy it straight from Lowrance. They cost $229 so you might want to shop around putting that money into a whole new system altogether.
Make sure you have the latest software updates if you get the newer LGC-12W. These can be downloaded at http://www.lowrance.com/en/Downloads/Product-Software-Updates/

Let me know if you need more help.