Just a quick question about opto's are they both meant to be glowing? my ST has four behind the target the back two are both glowing but with the front two only the left one is glowing and the one on the right isn't with my basic knowledge of optos I thought both should be glowing. ST has opto's on the ramps and both are glowing at each other :-) I did a switch test and they all seem fine even the one with a opto out? I've also re-seated the connectors any ideas?

P:S-anyone with a ST are all yours behind the target glowing?

Thanks Peter

Peter, I just came back from holidays. The optos behind the target are the same on mine to what you describe. The four ramps have 2 each with both lit but behind the target, the front right is not lit.
Just came back from Batemans Bay, not a pinnie in sight for a whole week!