I have a Gottlieb Vulcan that will sometimes not fully reset player one's score at the start of a new game. The game will reset and the score reels mostly reset with the exception of the 10,000s reel sometimes staying on 7, 8, or 9. The game will play fine you just start with 80,000 points, for instance.

Based on my initial research, I feel like the game shouldn't even start until the score reads zero so I'm wondering if a switch is occasionally stuck closed? I'm planning on looking at that score reel first unless anyone has any different ideas, thanks!

Thanks for echoing my logic. I think that's where I'll start.