Museum of the Game® & International Arcade Museum® Forums

I'm working on a big guns here and I'm pretty sure I have this one issue narrowed down but would like insight from someone who knows more about it than me........ I have a few lights out which are all on the same light matrix line, (6x,BB right, and a few others) these lights come and go it seems I've gone over everything on the playfield and checked all diodes and continuity back up to the pcb, removed the pcb and reflowed everything in that circuit as well as changed the diode incase it was breaking down...... Only thing left is the 2 transistors and resistor ........ The resistor checks ok ..... Has anyone ever seen a failure like this come and go ???? It's acting like a bad connection or something but I've gone over all that a few times already ...
Thanks guys