The centre action button does nothing and doesn't show in switch test. After a code update the game also reported node boards it could not find.
Action button dead and node boards go missing: reseat the harness and network cables
Cause: Loose connections: the action button harness at its board, and the network cables between the node boards.
Checks
- In switch test, press the button and work the leaf switch to see whether it makes contact.
- Note which node numbers the game says are missing.
Fix
- Unplug and replug the button harness at the board; adjust the leaf switch if it doesn't close.
- Power off and reseat every network cable between the node boards.
Systems
Games
Source: Pinball Repair help group!! (Facebook group)