I Have Two Lowrance Hds5 Lake Insight Units That Came On The New Boat I Just Bought. One Of The Units Is Great But When I Set Everything Up The Same Way On The Other Unit The Sonar Screen Is Terrible And Just Will Not Display Anything Close To What The Other Unit Looks Like. Any Suggestions? I Am Going Tommorow And Swapping The Bad Unit To The The Other Transducer Upfront To See If That Makes A Difference.