Everything works except Side an Down image. No picture what so ever. Unit has been on 3 different boats same result so it's not a power/transducer problem. Crazy part is under simulator mode SI and DI work but seem very hot or blown out bright an setting sensitivity dosent do much. HB will gladly work on replace for $500 but has anyone had this problem b4? Just strange that everything works fine except SI and DI. Is the unit shot?