How To Fix If The X-Axis Or Y-Axis Cannot Move When Test Home - Makeblock mBot Manual

How to fix if the X or Y-axis cannot move when test home?
Issue: The X-axis or Y-axis cannot move while clicking the home button on mLaser.
I. Wiring
1. Make sure the motor which control X axis is connected to correct motor port (Port 1) on
MegaPi. The motor which controls Y-axis is connected to Port 2 on MegaPi.
2. Make sure the wire connection is plugged into the particular port properly without loose.
3. Make sure the MegaPi stepper motor driver is plugged well. You can re plug it have a try.
4. Make sure the line order of the color wires for the motor is inserted correctly.
86