Thanks everyone for your replies...here are answers to some of the questions and some more questions I have...
First off, the theater is not outdoors, but has been "overtaken" by the catering company who has put all their equipment in what used to be the storage/dressing room area. I doubt this has anything to do with it, but the dimmers are right behind some of this equipment.
Also, how do I unplug the
dmx from the dimmers when the dimmers are the long stacks and all of the wires are in the walls?