I have an earthshaker that I just shopped out... when finished I noticed the shaker motor wasnt working... long story short, one the brushes was so worn it wasnt touching the armature. Purchased new brushes, replaced both, and shaker tested fine in test mode. However, in game mode when the motor should engage, (locked ball or other mode) game does a hard reset. Knowing that it didnt reset before I unplugged the motor, game no longer resets in play. Replaced motor with one from Road show, game doesnt reset..... So what would cause this issue? Checked for anything loose in motor, nothing, like I wrote earlier, one brush was completely gone and spring pushing brush in was at max, the other brush still had life left but changed them both out anyway. Any suggestions?

no ideas?