Ann Arbor, MI
Quoted from gjbwalker:-Replaced the female connector at J120 and checked continuity from the connector to the last lights in the back box. Good.
The odd part is that I swapped J120 & J121 and the GI on the playfield worked at J120, but still the backbox GI did not on J121.
How aboot the male connector? Are you sure you have continuity from the front of the board/pin to the back of the board traces?
If J120 works with both strings, and J121 works with neither, I might think it's not getting the correct juice to the pins.
EDIT: you have continuity with the female side to sockets, so let's look before that.
