The pop bumpers do not fire, though the fuses under the playfield test good.
Pop bumpers dead with good fuses: corroded connector pins at the transistor board
Cause: Corroded connector pins on the transistor (driver) board connectors.
Checks
- Inspect the transistor board connector pins and headers for green or dark corrosion.
Fix
- Clean or replace the corroded connector pins and headers on the transistor board.
Systems
Games
Source: Pinball Repair help group!! (Facebook group)