Problem:
X-axis motor not moving but Y-axis good. Or, Y-axis not moving and X-axis OK. 

Solution:

Please follow below procedure to check:
  - Power off printer, remove power plug
  - Open bottom cover
  - Swap X and Y axis motor connector
  - Power on, enter Monitor menu
  - Check if X and Y axis moving using manual function
  - If problem motor changed, means stepper driver in motherboard fault. If same motor not moving, means connection of motor have problem.