I tagged the Rotary attachment as that is part of the problem.
Fired up Lightburn as usual, but instead of a short beep from the GLCD, got a continuous squeal no display on the GLCD , no homing (X&Y no movement and can be moved by hand) but the rotary is locked up!
Not sure if the lights on the board are flasing in the right sequence. Older board.
Ideas on where to start?