stepper's crosslinked?

I just noticed when I crank the X axis manually, the Y axis will step one
way or the other, and that direction also depends on X axis direction.
Nothing powered up when this happens. What does this mean in electrical
terms, and how should I eliminate it? Is this a factor in the explosion of
a chip on the Y axis a few weeks ago? Thanx for all help.

Regards, Hoyt

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