The lower left and upper left flippers both stop working or work only now and then, while the right side is fine.
Both left flippers lose power: broken solder joint on the upper flipper coil
Cause: A cracked solder joint on the upper left flipper coil lug, on the wiring the two left flippers share.
Checks
- With the game on and the flipper held, gently wiggle the wires at each left flipper coil and watch for the flippers to come back.
- Inspect every lug on both coils for broken solder or a cracked tab, which is common on this game.
Fix
- Resolder the broken joint, or replace the coil if a lug has snapped.
Systems
Games
Related tips
- Flippers and lock kickout dead with good fuses
- Removing and checking the flipper coil stop
- One or both flippers weak
- Mount flipper coils with the lugs away from the coil stop
- Flipper coils have two windings
- How the two windings of a flipper coil work
- Testing flipper coil diodes
- How a System 11 flipper coil works
Source: Pinball Repair help group!! (Facebook group)