Also looking for complete internals for my s+...harnesses and includes MPU with blue volume control part#75505730, backboard 75903930, .$25 comparator (no bill validator) with coin optic board. If possible would like to buy complete bottom internals for my Double Diamond S+. I have lost power to the door optic sensor, cabinet optics has 9.o volts. I have taken it apart and ohmed the door optics through the connector and down to the J2 connector that goes to the back board..I have continuity. I don't understand how the J2 teminal 2a/b gets energized. Parts and advice welcome. Chris corvette95@gmail.com