I've gotten a few requests for the status of my Star Trek magnet fix. Here's summarized chain of emails I had with Pat at Stern. For what it's worth, I seem to have managed to solve my problem, so hope those with persisting issues can get some help from Pat's final statement!
Me: I have a Star Trek Premium and have been experiencing an issue since I've had it. During the Vengeance multiball, you are supposed to use the ball to knock the held ball off the magnet to begin a 3-ball multiball. The problem is that when I hit this ball, the second ball gets stuck and doesn't release until the 15 second timer is up. On the Pinside.com forums, there is a thread about this. I have read and followed through with the changes/tweaks that everyone has suggested (twisting the opto wires to eliminate any noise), however this has not worked. I'm wondering if the board is bad or something else is wrong.
Pat: Do optic switches 33 and 34 register during switch test? Do either of these switches register during switch test if you pound on the playfield?
Me: Switches register during switch test and do not register when I pound the playfield.
Pat: Try reseating the (2) and (5) pin connectors going to the opto amplifier boards under the playfield. Also, inspect the wires going into the connectors for poor crimps.
Me: I checked everything and played a few games. Ball is still sticking. I noticed that it stuck with the right flipper one game, and the left flipper on another.
Pat: Please swap the amplifier boards under the playfield and see if the problem persists.