Recently got my 2006 TL and love it, but my navigation display doesn't display anything -- just back light. Radio works, HVAC works. I've worked my way through the FSM diagnostic for Navigation "No picture is displayed", and I'd appreciate anyone who can clarify this for me.

On the "display panel control unit connector A (14P)", I am only getting 0.5V on Pins 1 & 2, but +B and ACC have 12V. Does this mean my navigation unit (in trunk) needs to be replaced?