Y axis not following control instructions

When homing my Lead 1515 (Black Box control system) the Y axis failed to home and had to turn off machine. Reset all, checked wiring etc but nothing obvious and still unable to home. Disconnected two Y motors from machine and tried moving spindle with Easel control panel but the spindles only turned a mm or so even though the instruction was to move 10mm. I can move Y axis screws by hand easily…
Swapped my X motor on Y axis and it worked as it should.
Wondering if Y axis motors are finished?

Sorted. G-code for Y axis acceleration had changed from origional somehow.

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