Quoted from Jherre6:
Did the start button ALWAYS flash during the entire game? Mine is doing that after today’s update. Maybe it’s something I didn’t notice.
After a few more games it flashes randomly per ball. IE.. ball one this game flashes and ball three. Ball two and three the start button flashes next.
I haven't really looked at the start button lamp handling in a long time, but nobody else has mentioned it.
Basically it should flash when you're able to start a game - so, in attract (if in freeplay or if there are credits) - and then it should be on solid during ball one (if in freeplay or there are credits) because you can add a player, and then be off for ball 2 & 3.