It will read just fine then screen just locks up. It will do it on 2d sonar, down imagining or side imagining. it may freeze up after 5 minutes or it may work for 30 minutes but it freezes up every time. I have to turn it off and back on and then it will work for a few then lock up again. Any suggestions? This is the unit at the console. The solix 15 at the bow works just fine.