02-14-2007, 09:13 PM
I don't believe this is true about the lights needing to be on or it will freeze and ruin the screen. I fished with a Humminbird 100sx for 3 years in Alaska down to -35 and never used the light on it unless I was inside my shack or fishing in the dark and was still working for 2 years in Utah before I destroyed the transducer. I had the same problems with it showing depths in excess of 400 feet and it was just the transducer problem and not the unit. Replaced the transducer 1 time and it worked fine. My 2 cents on this subject.
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