The E-stop is probabally caused by the OL, this is probabally the spindle OL in the SP drive unit, If you have the big Mitsubishi DC drive, take the front cover off (4 screws) behind it is the Non-Fused Breaker, also while you have the cover off look at the small black flag fuse on the top left of the front board.
When you power up, look at the status LED's on the front PCB.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.