I just traded my old boat for a new Lund with a dealer installed Helix 7 MSI G3 on the console. I had it out for the first time tonight and both the DI and SI had all kinds of noise on the screen. On the SI, the left side was much worse than the right side. I tried multiple speeds, depths, bottom type and all was the same. The 2D sonar was clear the entire time. Any ideas?