X-Carve Z-Axis has no power

Carved a sign yesterday, worked without flaw.
Start it up today and it won’t home. The Y and X axis will jog, but the Z will not.
I swapped wires with the x axis and it would jog, so the motor is free and clear and working. I returned the wires and checked conductivity from the back of the controller to the motor. All Good.
Next, I put amp meter on the back of the control box where the Z-Axis comes out and found that no power is being sent out of the box when I click the jog button. I verified that I did read a blip of power when I clicked the x&y axis. Nothing on the Z.

So, now what do I do?