OK. I'm working with an old NSI Board and two four channel NSI Dimmer Packs. These things have been in storage for a while but I'm told were in good working condition. The problem is that our lights are not doing as told. We try to fade them up slowly and they will suddenly pop to full brightness. We try to dim them out and they stay on, maybe a minute later shutting off. The odd thing is that it's not the same channels doing it every time. It's killing our light design. So, is it the board? We have two NSI boards and they are both doing it. Is it the dimmers? One thing to note. The dimmers are far from the electrical outlet so I'm having to plug the each dimmer to an extension cord and feeding that to the outlet. Could this be the issue? My director/ designer is very good at what she does but is embarrassed at how our show is looking. Please help. A.