Quoted from Law:
The hand issue sounds like it's due to you moving the hand past the limit switch on the X axis, make sure that it's not already closing the switch when you boot. Could also be something wrong with the optos, take a look at the limit switches and optos in switch test mode.
Law mentioned some detail which relates back to an issue I was having with my JM. The Y opto - if the hand is not working correctly it will cause the fuse to blow and or not allow you to plunge the ball with the start button. Question-- Does the glove tend to move back and forth continuously after start up? If yes, then go into your test menu (switch test) and look for the 'Hand Test." When the "Hand Test" shows on your DMD, close the coin door, let the test run and see if it passes or fails. If it fails then you need to pull the playfield out and move the motors manually to see if the X or Y opto is registering properly.
While in "Hand Test" mode - Turn the motor (Circled in red below) and see if it open's and closes. There are two motors you will have to test, (shown in the pics below). On the DMD Screen, both boxes should show an "X" one after the other and then both disappear while rotating. Do this test for the X opto and for the Y Opto. In my case the Y opto was not opening and closing correctly. I took out the opto board, ordered one on Marco Specialties and reinstalled. Ran the test again and it failed. I then took the 6 wire plug (picture blow) and ordered a new one from Marco, guessing it was old and needed to be replaced. Reset the wires in the new connector, ran the test and I was golden. Fuses did not blow, hand test successfully passed on start-up, and the plunger worked.
Here's the link to purchase the Opto board and six pin connector from Marco that connects to the opto board.
Opto - http://www.marcospecialties.com/pinball-parts/A-20533.1-1
6-pin - https://www.marcospecialties.com/control/keywordsearch?SEARCH_STRING=6r+mt%2Fend+22%2F.100
Punch Tool to connect wires to the 6-pin - https://www.marcospecialties.com/control/keywordsearch?SEARCH_STRING=Punch+Tool+-+IDC+T+Handle+for+.100+
Hope this helps... -Art