I have an EXT 40 watt Epilog. I have not used it for a couple of weeks. I started a new job, the tube was not firing-it often takes a minute to get going. The machine suddenly moved the main beam Y xis to hit the front of the machine. I quickly switched it off. Made sure everything was moving OK. Switched it back on and immediately the beam slammed to the front of the machine. Checked all electrical connection . No improvement.

Any one had the same problem?