Modela MDX-40 3D Milling Machine
No activity on the unit, no power.
There are several possibilities as to why it won't power on
Are you getting power from your AC power receptacle or surge protector? Try a different outlet or plug, are other devices working fine off the same circuit?
Is the emergency stop botton pressed in? Release the stop button.
Reference page 42 in the User's Manual, "To cancel an Emergency Stop"