My bow Solix 12 MSI+ G2N with the MEGA ducer mounted on my Ultrex running 3.420 looses sonar, down imaging, and side imaging several times a day out on the water. The graph still works just fine for the chart and anything else. I loose depth and the 2D/DI/SI screen is stuck on whatever image it read last. I've tried turning the sonar off, standby, etc. The ONLY thing that fixes it, is powering off the unit and then back on. It's really frustrating since I have to do this several times a day.