I asked for some help under another thread ("Is it bad") and only received a small amount of information. It seems my HDI transducer may not be working. I fished the other day and the down scan was not visiable on the screen. I changed speeds and frequencies and nothing seemed to help. Sometimes it would go back to work and go away again. I was fishing in the sun and my unit was a little warm. I was wondering if it was my unit, but the 2d seems to be working fine. Would you guys think this was a transducer problem? I don't know anyone else with this unit to swap out heads with. Anyone else have any problems.......crappie113e.