Linc Intermittently Shuts Down

[Carbonless]

I've been through quite a few of the articles with issues with the Linc and have been having one myself that came to a head yesterday. Short story is the shop replaced my steering cables and now I have the Linc system randomly shutting down starting at the shop just before they sent it home to me 2 weeks ago. They thought it was a charging issue with the battery because it came back on. Happened to go out and come back on a couple more time the last 2 weeks - when it goes out the screen goes dead and I have no audio or NSS etc control but the mechanical controls work fine. Now, I went out Saturday and it worked all day until I left a tie up w friends and then it shut down completely. The mechanical worked, but when it shut down the rear NCRS plate was extended and made it very difficult to get back since I couldnt get it to retract.

I jumped in the boat yesterday to try and recheck all of the connections behind the Linc and there's a ton of loose wiring flopping around (def not right that the dealer left it that way) but I tried to press everything tight to resolve and couldnt get it to stay on. Best I could do was get it to turn on and stay on, but the minute I shut it down it would not restart (no movement in the boat, no shaking or movement to the harness, just a restart on the button keypad).

Anyone have any ideas? I'd love to take this thing out before the end of summer and the dealership is too backed up to take a look for a few weeks. I'm about to head out now that its under 85 degrees and try to clean the connections with electrical cleaner and remount some of these loose wires and/or locate where the unconnected ones go. See Below:

[Carbonless]

As an update, I think I may have resolved the issue (hopefully). I tested the battery voltage (13v) and then disconnected the terminals. While disconnected, I thoroughly cleaned all of the terminal and ground connections and binding posts with electrical cleaner and checked for corrosion (none). Pulled the dash panel and found several of the wires and subharnesses loose.




The Linc head unit had a missing screw that was floating on the floor that I reinstalled (doubt that this caused the problem, but now its fixed). I pulled all the spade connectors and cleaned w/ electrical cleaner and press-fitted the remaining plugs and took pictures of the loose ones. Found a total of 2 USB B's that were unconnected (I assume they are for service and not related to Linc).



Found one nut loose on the right most screw of the binding post, but the screw is too big for the large wiring connector w/mounting plate that is loose. Found and took pics of the remaining open connectors.

Finally I ziptied all the loose subharnesses and connectors so that they werent flopping around. Reinstalled batteries and connections and reset the Linc Buss. Linc turns on 10 out of 10 times now so I guess I'll take her out and see how she does.

There is a slight modulation in the voltage of the Belly Ballast Sender - fluctuating from .58v to .60v (7%)




Still don't have a solid reason why there was an issue since all of the pertinent connections seemed connected. See pics attached of potential issues...let me know if you have any idea where these connectors are supposed to go, if they are supposed to be attached at all.