Just picked up a Johnny a few weeks ago and already having hand issues. Booting the machine causes the hand to move to the home position at the X-axis and then repeatedly move back and forth at that home position about half a centimeter at a time. When it moves it closes and opens the X-axis home switch. Activating the hand test results in failure. The hand is all the way forward (toward the player) on the Y-axis and I'm not able to manually move it along that axis.
Through switch testing I can tell that the X-axis optos and Y-axis optos are activating correctly as well as the X-axis home switch. I haven't been able to manually move the hand along the Y-axis so I'm not sure whether the Y-axis home switch is working correctly, but it's showing up as closed in the switch test.
Would love to hear some ideas regarding next steps. Has anyone experienced this particular behavior with the hand?