I've got an NSI NRD 8000 Dimmer unit which works great except one channel stays at full 100% all the time. All the fuses check out and the LED indicator on the front panel varies up and down with the board fader. The board works fine with another dimmer unit. I have a fair amount of electronic repair skill, but before I pop the board out and start poking around, I thought I'd post here and see if someone could point me to the likely problem. This seems like it would be common. I'm thinking that it is probably a dead SCR. I'm not sure if they tend to fail 'open' or 'closed'. I imagine replacing them would be pretty easy and I would be lucky if that was the issue. Thanks.