On my centaur all lamps work as expected during the initial attract and game play. After a game when it goes into attract a single lamp stays on. It works fine if I go back into a game. The SCR tested fine and another I replaced it with.

Any thoughts how to track this down?

That's a good point. I'll do this.

Update, found on a couple different videos that this does not happen normally.

LDB. It's 10 Bonus lamp Q34 to be exact. I've got a line on another LDB I can try

the SCR gate "G" for Q34?

Same. I'll swap out the resistor as well but there's not much more in the circuit for this lamp.

Correction: Was Q35

Solved, A friend noticed the Match light was on at the same time. The pins for match and 10 were connected by a thread of solder on the LDB. Thanks everyone for your help.

No worries at all. Knowledge was gained.