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Old 09-12-2020, 05:26 PM   #4
GregBrannon
Guru
 
City: Solomons, MD
Vessel Name: Branwen
Vessel Model: Hatteras 48 LRC
Join Date: Feb 2015
Posts: 645
When my J300X was failing, sometimes it powered up, sometimes it didn't. When I decided I needed more reliable operation, I bought a used one from a second-hand electronics source. The used one has been working well for 3 years, but I know it won't last forever.

There is very little the end user can do to determine what is wrong with the Simrad AP system if it doesn't power up beyond checking that the junction box is getting power at the terminals. I can't think of anything else, but I'm not a professional.

Greg.
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