I know this is not much help but,I'm really not a cnc type either, but I ran a couple of huge metal saws with this control probably 10 years ago and when I called the NC Techs they usually tried to replace the bubble memory from 1 machine to the other. There was a certain sequence they used to restart it and if you didn't go by that exact sequence it wouldn't start up. Eventually, they finally gave up after replacing some very costly electronics boards and eventually the machines were taken out of service. Tried to get the head guru's to replace with upgraded controls, but it would have been very expensive. Don't have a clue whether you should upgrade but I would imagine it would be quite expensive. Just my thoughts. One thing I do know is don't shut it down once you get it back up, if you do.