I hope someone can help, i am in a bad spot. most of our lights in our 700 seat auditorium have begun flickering. There seems to be no rhyme or reason. About 50 channels of the 100 we normally use flicker and their flickering, in some cases, affects other lights. We have 4 etc L86 racks, each with 144 dimmers. I have tried turning power off to each rack and dimmers alternatley but the other racks are still affected. I have tried swapping the control cards, nothing changes, i have bypassed the architectural rack, still nothing changes. As of now we have about 50 working (non blinking) dimmers, i have not yet taken any dimmer modules out. by not using the "bad" dimmers i do not have any flickering. I am going to try taking out some dimmer modules to see if that changes anything, but i can't see how. Nothing new has been added or changed to the electrical in this building in a few years. We need about 200 channels in the next 5 days for soe big events here. PLEASE PLEASE HELP!!!!!