I used to try and test transistors, I always had mixed results testing them with cheap multi-meters. I was told that the low power of the meters could often not simulate the required load to reliably test these transistors. I would love to hear feedback on that point.
At this point I just don't test transistors. If I have eliminated the other obvious problems I find it is easier to just replace the transistor. It always fixes the problem and it is very quick to do on these early Bally pins.
Buy at least five TIP-102s. They are cheap and you will need them, the driver board transistors often go bad. The shipping is what kills you on these electronic parts.