Hi,
If I were you, I would replace Q30 also. I happened to me that a TIP transistor tests ok on the multimeter (between 0.4 and 0.6v) and was still faulty. Lost a few hours trying to figure out what was wrong. You can put a TIP102 instead of the usual TIP122, they are more robust (I was told).
Good luck with that, JP is an awesome game.
Marc