I took it apart after talking to Lowrance.Didn’t see any visible sign of anything wrong. I don’t have a way to check the motherboard but I suspect that’s the problem.
It’s still under the prorated warranty but IMO Lowrance made me a stupid offer of $50 diagnostic plus $1350.00 replacement fee and shipping with only a 6 month warranty.
Everybody has these head units on sale right now for around $1800 with full warranty because they are closing them out to introduce there new units for 2023