My side imaging on the left side has been dark with lines the last dozen or so times I've been out. It will work normal sporadically, but go right back to the dark with lines. And nothing is changing as far as trimming the motor or anything turning on or off, that could be causing like interference that I'm aware of. I've tried raising the trim and turning pumps on and off. Nothing i do changes what is going on. Ill post pic of screen shot in comments. Anyone have any idea what is causing this?