new on this and just done the construction of geetech I3 pro b 3d printer
everything looks fine in the all axels. I tested many times..... but I saw one of the z motors are not moving, x and y worsk fine.
I reviewed all the connections and they look like intructions and videos viewed
I exchange between them the both z terminals at the control board (see picture) and guees what, when I tested again the another one stops, my question is, is the control board damage something plug or what could be??
please see video and picture
video: https://youtu.be/Z_y-AxBgZzo

Rgds