If it is a older unit and not new, could be that your battery is not up to snuff and on it's way out. Things like that were happening to my 45 just before the battery died. Check all connections. Ice or dirt on the bottom of ducer ? When my 45 acts up, demo mode resets it and it works fine. My 45 is almost 10 years old now and the lcd read and optic read are 1 foot different. Time for a new one soon for me.
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Kim
Gonna get me a 16" perch.
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