Thanks. I spent this morning checking continuity and all is confirmed with the schematics.The only way I found these broken traces was studying the Bomarc schematics and checking that every pin on all those buffer chips went to where they're meant to. Good luck!
The only thing that is incorrect that I have found is with UG1 pins 11, 13, 15 & 17 don't go to RP7, but go to RP8. I also have a battery bombed Mac IIx board and double checked. UG1 Pin 11 goes to RP8 pin 5, 13 to 9, 15 to 3 and 17 to 1.
So I am unsure why I am not getting NuBus to work. This board may have other issues. I thought at first it might be a problem with ROM. There is no boot chime, and no video, similar to not having a ROM stick installed. I replaced the ROM socket.
I will keep digging. Thankfully this is an extra board.
I'm glad you were able to find your issue.