Quoted from diesel:
(1st photo)LM399's replaced, connectors plugged in and still rows 1 to 5 have a ground short.
(2nd photo) I unplugged all connectors from the 10 opto board and switch 24(always closed) and 36(trough stack) are displayed.
Should I just buy a hammer!
Nono, if nothing else, I'll buy the game from you.
Okay, this means that the issue is ON the 10-Opto board, but not related to the chips or that diode.
If you HAVE a different 10-opto board (from another game, example) and try that.
If you don't, check the other diodes on the board. Check traces - make sure no traces have shorted. Check the wiring on the plugs, as well.
Also, try this - what do you get on the screen if you leave the 10-Opto board plugged in, but *disconnect* the Trough Opto boards?
Edit: Odd thing to check, but check the +12V DC coming into the Opto board, as well.