[CA] [CA11] e7d loss of depth

[robertdungan]

I've got a recent issue with my e7d multifunction display / depth function. The unit is about two years old and with the exception of an intermittent failure to read the HOME touch button when trying to exit the chart-plotter function, things have been working well. Two weeks ago, my authorized Raymarine installer suggested that updating the software to the latest revision might resolve the issue, so he showed up and performed the update. At this point in time there was about a week to scheduled lift out for winter storage. There seemed to be multiple updates available, so he did them all. This led to a few auto-pilot issues, such as loss of the deviation table values (detecting magnetics), but we seem to have resolved them and everything seemed to be working well. By the way, the software update did not resolve the issue, but a touchscreen calibration appeared to resolve it. The boat is sitting in about 18 ft of water, the depth was reading OK, the maps appeared right. A few days later, we left port for winter storage at another boatyard. The depth reading got lost as we passed through the harbor mouth (about 11-14 ft) but recovered when we got to deeper water, say 20 ft or so. The depth appeared to be OK for the entire trip, but we lost it again when we tried to enter the channel to the boatyard, just when I needed it most. The symptoms are either no depth reading or an absolutely unrealistic value (like 610 ft), and there are big spikes in the fish-finder function, with a few blips that look like about the right value (10 ft). Not only that, the scroll rate seems to speed up and slow down. The unit has worked right all summer but now suddenly this has happened. The only thing that has changed is the software update and recommissioning the AP. My Raymarine installer has been notified and can start diagnosing the problem, but since the boat has now been lifted and is on the hard, there's only a few things he can do. Nothing can be tested until the boat is back in the water next spring. By that time, my warranty will have expired. He's not sure how a warranty claim will be handled in that case. I've got the problem now, it has been reported to the dealer, but it won't be resolved until next spring. Anyone have any ideas what the issue might be?
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