We have a 1986 Star Vnc 32. We were changing a 3/8 bar and didn't close the collet and hit start. The material was pushed up a few inches and the monitor and panel went out. It was if the estop was tripped. My partner had a friend look at it but they couldn't figure out what is keeping it from coming back. They said it's like the reset button is stuck. The button wasn't pushed when this happened either.
I can post more info if someone has any thoughts on this.
Start by disconnecting the main power supply switch. Open the electrical panel door and press every reset button, heater and circuit breaker you can find, then check every fuse. There's got to be an overload tripped in there somewhere.