I did a little research for you, but I am not an expert. “Whether or not you believe in the authenticity of the treatments, most “treatments” lasted no longer than 10 minutes,
and if the machine is allowed a 20-30 minute period of “cooling off” between treatments it will last a lifetime. Violet
Ray machines are often more expensive to repair than they are worth, so it’s best just to take good care of them and
they will last indefinitely.” Source: http://www.electrotherapymuseum.com/Articles/VioletRayMisconceptions.htm
However, from your question it looks like you don’t need to hear that, but you need to fine someone to repair them.
Post the question is ask the community http://www.worthpoint.com/node/add/question – and hopefully you’ll get the answer you need.