After a fuse blew and was replaced, none of the ball-in-play lamps or the Game Over lamp light. The ball count unit steps normally and the bulbs light when jumpered.
Ball-in-play and game-over lights all dead: bent switch blade on the O relay
Cause: A blade on the O relay switch stack (which these lamps run through, normally closed) was bent against the next leaf.
Checks
- Trace the ball count unit lamp feed back to the relay switches it passes through.
- Check fuse holders with a meter on both sides; any fuse voltage rating at or above the circuit voltage is fine, it's the amp rating that matters.
Fix
- Straighten and re-gap the bent blade on the O relay.
EM games have line voltage in the cabinet; unplug the game before adjusting relays.
Systems
Games
Related tips
- Game starts but flippers are dead and nothing scores: dirty relay switches
- Ball count drops by one as the first ball is served: stuck 10-point playfield switch
- Ball count runs to 10 and the game resets endlessly: dirty ball count stepper
- Game won't start though credits and reels reset: bad joint on the latch coil
- Tracing a dead playfield switch to its relay
- Hitting targets runs the ball count to game over: shorted rollover switch
- Bonus lights stop advancing and stay on one value: stepper unit plunger sticking
- Players, credits or ball count not resetting points to a stepper unit
Source: Pinball Repair help group!! (Facebook group)