Hello. I'm new to these forums and new to the lighting world. I'm currently working with a relatively small stage at a church, and I am attempting to use a light bar that had been installed before I started working here. We have 3 NSI DDS 6000 dimmer packs (4 channels per pack, 2 inputs per channel, 1200W per channel) on our light bar. On one of the packs, two of the channels are dead. When I plug a working light (500W PAR64, MFL) in from another working channel, nothing happens on either input. Aside from checking and replacing the fuses, is there anything else that I can do to get those channels working again, or anything else to check or verify? I'd rather not have to send the pack to NSI, but I also don't have a lot of electronics experience, so I wouldn't be able to do a major fix myself. Thanks for any suggestions.