Originally Posted by Kooshball
Solved! It seems that there never really was an issue...when the unit sees airspeed but no GPS ground speed it gets confused and displays all kinds of obstacles which is what those lines are....
Did they see that picture? It's hard to imagine that they would think this is normal...
I had a pitot static test done on mine inside the hangar and didn't see this. My hanger may have allowed some GPS signal in, since it's quite old, and has some plexi tiles for light.
I have not tested something like this while disconnecting the GPS antenna or covering it with multiple layers of something that will prevent a signal from coming in, but I might.