Before you send it in to HB....

Check the male pins in the connector and the female pins in the unit...check for corrosion or missing pins...

Try bending the pins out "ever so slightly"...

Take the GPS connector (and the power wire connector) (you will not need the xducer for this test) out of the mounting bracket and plug them directly into the unit...wiggle the connector while watching the "Accessories" screen to see if you can get the unit to recognise the puck...

Rickie