Update
Updating database... Please wait.
Thursday 3 May 2018 at 21:42
I don't recall ST having node boards. Are you talking about the opto board? If so, you should be able to easily test that by swapping the switches and seeing if the fault moves to the new location (optos themselves) or stays put (the board).
Source: http://pinside.com/pinball/forum/topic/startrek-stern-issue-467-warp-ramps-wtf#post-4377692