Humminbird Helix 5 GPS G2

Hey all...wondering if anyone in the San Jose area is running this unit with good results. Mine refuses to show depth. I've updated it, replaced the transducer, it's direct wired to the battery with a fuse, connections and wires all look good, shows speed and temp...just no sonar... I'd like to plug the head into someone else's set up before returning to Humminbird just to make sure I'm not the problem.

stupid question but have you tested it with the transducer submerged in water? Also, do you hear a "clicking" sound from the transducer itself?

I've tried with 2 different transducers, submerged at sea, and submerged in my swimming pool. No love. One of the transducers used to work.

What did their tech support say?

Tech support said a) update software <done, no change> b) plug head unit in to same setup that works, so I'm hoping to find that here. I  really like the unit, but no depth=brick