Did you remove one leg from the board to take it out of circuit before testing it?

I have a Sound Stage (2 player version) and that actually is a pretty good player..
I went through I believe 3 Sound Stages, and never had that issue, so never had to
dig deep into those concealed relays. I can say, that it can get cool in the basement,
and on the last S.S. I went through, the spinner doesn't work so well until it gets up
closer to room temp. I think I put #44 bulbs in for that sensor..
For the price of a diode, maybe wouldn't hurt to replace it..
If no luck, I'll see about cracking the S.S. open and check on any other ideas.. (T)

Yeah that would be a basic 1N4004.
Does the relay hum when you hit any 1000 score and not just the spinner? I was restoring a Juke Box and had many issues with it. I had to put it back in storage because of other things. However, I had a problem with the 1000's. Every time a new game was started, the first time the 1000's was enabled the relay in the backbox would stay engaged and would hum. Ultimately it turned out to be two things. The 1000's score switch(end of throw?) Can't remember what it's called. Also, because of that the "player score unit" had a burnt etch for player 1. Ultimately I had to replace the coil in the player one 1000's and bridge the etch on the Player Control Unit. Sorry that was long winded.