I purchased a brand new 788ci the year it was made. I instantly has issues with it. Johnson outdoors was a joke in figuring out a problem. I told them it was as if a transducer was weak for various reasons, they made me send my head unit back twice. With no changes. I would be surprised if they help you out. After dealing with the issue for a season I sold the unit for half what I paid and then a month later a recall on the internal failure of the metals in the transducer. I wish you luck, but your ducer is your issue.
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