We have a Lehigh DX Dimming Rack installed at our church. Recently we noticed one row of house lights are not responding to our Collage control unit which is a tabletop box used to select different lighting cues when not using our light board. It is connected to the rack via serial cable. The lights also do not respond to our lightboard. I don't believe there is a patch issue on our lightboard because when I go into patch in live mode the lights don't respond when their DMX number is displayed. There are four lights that are out. They all have the same DMX address and are all on the same circuit. When the lights are supposed to be on, we have no power going to the outlets which the lights are plugged into. I suspect a dimmer module may have done bad. I'm wondering if we had a power spike because about 2 weeks ago we had 4 spotlights all blow their bulbs at the same time. I wonder if we could swap out the suspected bad module for an unused moduel. May be a bad breaker as well. All breakers appear to not be tripped. Any suggestions?