Hi. First, please pardon my bad english. I have the following problem with my new UM2: After unpacking and installing I got till the first run wizzard. At step 4/21, as I understand it, the Hot-End should move to the middle of the bed and I should be able to move the bed with the rotating knob. In my case, nothing happens. None of the motors does one single step or even a noise. Only things that work are the lights, the middle fan at the hot end and the display. I checked the wir