I'd think your transducer is ok since you have DI working.
-Did you turn "Contour Mode" OFF?
-Are you networked by chance?
While on the SI screen press >Menu >SI Enhanced >Contour Mode Off >Exit
Mine has stuck like yours a few times and would not change even if I changed "Contour Mode ON to OFF. I've had to restart the unit. Did this a bit my first few outings and hasn't done it in a while.