Here is the identical sacrificial board that I attached to a piece of MDF and made more accessible for testing AFTER I replaced a diode that I believed was causing the malfunction:

[Linked Image from i67.tinypic.com]

This unit appears to be working fine. I have removed the touchpad and replaced it with various wires attached to a terminal strip. I can short the wires together which will cause the appropriate indicator light to come "on". Then I can cancel those same lights. Before I replaced the diode one of the "call" lights was always "on" and could not be cancelled.

A malfunction at the junction
--------------------------------------
Dwayne