Nuova MDX espresso grinder wiring help

provide in detail about your problem ..........

THE POWER SWITCH MAYBE DAMAGED

make your grinder more fine
the coffee is gross

change the clump crusher or maybe it is missing

Remove the bean hopper and vac out all beans, then remove black cover, then 3 phillips screws, and top part of burrs should come off. Clean our chamber then reassemble. DO NOT TURN ON. Make sure middle nut in chamber spins freely, use fingers to turn, if not adjust setting to coarser, until it moves freely, then turn on grinder. All you have to do now is set your grind.

There isn't one, because your grind depends on the bean you are using, the temperature and so on. The best thing you can do is clear the burr chamber of beans, then turn grinder clockwise until you can no longer turn the brass fitting in the middle, then turn counter-clockwise to about 4 numbers that will give you a nice starting point to setting your grind.

you have it :

http://www.nuovasimonelliusa.com/grinders.html

fame !

Generally, coffee beans are oily and form a goo in these machines.  You may get lucky by first unplugging the machine, getting some copper wire (#14 or #12) and poking around in there to loosen the crud up.  If this doesn't work, the unit will have to be disassembled and cleaned.  Messy!