Two of the drop targets fall but their inserts keep blinking and the game does not count them, so the lock never lights. The third target works.
Two drop targets drop but don't register: reseat the node board connector
Cause: A poor connection at the Molex connector feeding those target switches on the node board.
Checks
- Check the targets in switch test.
- Find the connector for those switches on the node board and inspect the pins inside the housing, where damage hides.
Fix
- Unplug and firmly reseat the connector; repin or replace it if the contacts inside are damaged.
Systems
Games
Source: Pinball Repair help group!! (Facebook group)