Just picked up a CFTBL and everything worked fine when I went to play test it, once home, when I turn the machine on, the two VUK's on the right side start activating for a couple of cycles. Once I start the game, the ball travels to the these kickers via subway and just sit there not being sensed by the optos I suspect.
Lifted playfield, checked wires to the optos they looked fine. No broken or weird looking solder joints.
Any suggestions on next step in troubleshooting?