My Surf Champ is now operational, but none of the playfield objects (slingshots, spinner) which are supposed to score 10 points, will score at all. (The slingshots work, they just won't score.)
When I start a game, I can hear a buzzing coming from the backbox. It appears to be coming from one of the player 1 score reels. I recently had someone else power up and start a game and noticed that the N relay (the 10 point relay) in the backbox immediately energizes. The 10 point score reel will move one or two positions, with an accompanying chime, and then stops. It will not score 10 points when anything is hit.
I decided to try it in two player mode, and when the first player's ball drains, and scoring switches to the second player, the player 1 score stops buzzing and the player 2 score reel then begins buzzing. When the ball drains and scoring switches back to player 1, so does the buzzing.
The game is new to me, and I have not cleaned the score reel switches. Could that be the source of the buzzing? Or is the energized N relay causing the score reel to vibrate? While the N relay stays energized when the game is playing, the coil does not appear burned and seems to have the proper resistance (15 ohms).