Dead 6040 controller box

[Zeeflyboy]

So when you flip the power switch, does your PSU produce whatever voltage you would expect when measured with the multimeter? (Most of these machines are 40v I believe these days).

If your new PSU doesn't produce any voltage, then it would be fairly safe to assume your problems lie in the e-stop area.

Oh did you check if the kettle cord input plug on the chassis has a separate fuse? Some do.