OK going to answer my own question and hopefully it helps someone else with this same problem:
First, ran the start up diagnostics that energize every instrument and light. Everything worked EXCEPT the Neutral indicator.
I used an Ohm meter to check the Neutral switch on the transmission. In Neutral, the switch is closed (0 ohms). In gear, the switch is open.
All that remained was accessing the Bezel Assembly, Indicator Lamps, p/n 68789-96B
This wasn't difficult: Removing the tach and speedo allow easy access. Both the tach and speedo are held on with 2 screws each.
Once they are out of the way, the Indicator lamp part can be removed by releasing 4 retainer tabs.
To access the actual lamps/circuit board, you must pry open the plastic housing, which has 4 retainer clips.
Looking closely at the circuit board, it is obvious the IC that drives the Neutral lamp is burned out.
I ordered replacement part 68789-96B