I had a T2 that was acting the same way. Turned out it was just the 20 year old ribbon cables. Ed at Great Plains made new ones for something like $12. Fixed it right up. Now I always replace ribbon cables when I get a new game.
Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside