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    2 in 1 extruder one side only goes back and forth rapidly and will not extrude.

    We are troubleshooting the 2 in 1 extruder in a gmax pro. the #1 motor doesn't turn. it just ticks. When we move that cable to the #2 motor it does the same thing. Not sure how to trouble shoot the main board. We have tried different cables with no change in symptoms? perhaps a...