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So I've got a Violux 5002S exposure unit that has worked like a champ for many, many years. However, recently, I'm unable to shut off the ballast. It has separate push-button on and off switches. It will power on just fine and my Douthitt controller seems to work just fine, but after exposing a screen when I go to shut the ballast off the off switch does nothing. I tested for continuity on both the on and off switches and they both test fine. Not sure what else to check. The only way I can turn it off is to pull the plug, and I know that isn't great for the bulb as it's not cooling down properly.

I'm certainly no electrician, so ANY help is appreciated!