When your X axis is not moving, it's usually because the Flexible Flat Cable (FFC or ribbon cable) are not inserted correctly, especially for the 30-pin one connecting the breakout board to the base.
When checking for problem, don't just pull it out immediately, do a visual investigation first and make sure the pins on the cable are lining up correctly to the pins in the female connector, below is picture that the pins are not lining up correctly. When the pins are not line up, remove it, and re-insert the cable carefully and double check if the pins line up correctly. Also, take a look at both end of the cable, make sure all the pins are fine.
first pin not line up
After confirming the pins are all line up and the problem still exist, you may then move on to do a visual check on the female connectors on both end. First, remove the cable, and make sure there's no missing pin. Second, make sure there's no burnt mark or weird color change on the female connectors. Connector burnt can be cause by misaligned pins.
missing pin in female connector
If all check didn't help, please contact our customer service
for further assistance.