So I bought 2 new units a helix 5 si gps mounted on trolling motor and a helix 5 di gps on consol. I watched several videos on setting them up but these are my first good units. I took the boat out just to play and these are the issues I'm having.1st On di and 2d sometimes the bottom of the lake will disappear when it does it will do it on both at the same time and I'm sure of how deep the water is so I know I have the bottom range set good. 2nd the depth shown is way off sometimes I was in 12 foot of water and it was showing 4 feet. 3rd don't know if it's supposed to do this but the depth reading will disappear off the screen then show up for a second then gone again. 4th the unit on my trolling motor when switched to di will show good picture for a second then gray lines will scroll across the screen. 5th I'm sure this one is all me but after getting the units set where I get a decent picture I have yet to see a fish on them even though I know fish were there cause I was catching them. I pulled over a brush pile in 12 fow had a good image of it on di and 2d played with settings but never saw anything that resembled a fish so I fished it and caught 4 and missed a couple more. Sorry for the long post I'm just pulling my hair out trying to learn these things anyone with experience with the helix units anything you can tell me about how you have yours set up would be greatly appreciated.