One of the axis behave weird, does not answer or move badly.
Tom make sure what could be the issue.
1. Swap cable to a stepper motor that is working good.
If the problem moves to the working stepper motor we know that there is something wrong with the cable and need to change it.
If the problem stays at same stepper motor we know that it is the motor that is broken and we need to change it.
2. Swap stepper motor driver to an axis that you know is working good.
If the problem disappear we know that you need to change the stepper motor driv
3. If the axis move but make sounds: Put grease on the rods