Also noticed on this AC that there was water dripping from above the pax to the left of the control panel for reading & call lights, was only in one location..but could this be condensation and related to the APU inop?
Yes and no. On a humid day it is common to develope significant condensation in the cold air ductwork. Please give up your obsession with an inop APU. I have personally seen passengers come off an airplane who forced a return to the gate due to condensation dripping out of their air vents HOGTIED!