The right flipper does nothing, and the usual checks of the coil, switches and wiring find nothing wrong.
Right flipper dead though coil and switches test fine: cracked joint on a backbox board
Cause: A hairline crack in a solder joint on the backbox board that handles that flipper circuit broke the connection.
Checks
- Pull the backbox board in the flipper's circuit and inspect its solder joints, especially at header pins and larger parts, under good light and magnification.
- On games of this era, also check the female connector pins on the board plugs, which often fail and cause intermittent faults.
Fix
- Reflow the cracked joint (and any others that look dull or ringed), then refit the board.
Systems
Games
Related tips
- One flipper dead with full voltage at the coil: cracked joints at the flipper relay
- Flippers dead though fuses and EOS switches are good
- Both right flippers dead with power present: dirty cabinet button contacts
- One flipper dead with fuses good
- Flipper coil diodes must be fitted the right way
- Flipper won't kick but holds if lifted by hand: dirty or worn EOS switch
- Both right flippers dead, left works: wire at a coil lug not making contact
- Upper flipper flutters, then dies: pitted EOS contacts
Source: Pinball Repair help group!! (Facebook group)