No background music, only target sounds: set feature adjustment 18 to 03
If the game makes sounds when targets are hit but plays no music, check the sound option in the game adjustments before suspecting the sound board. Settings are often lost when the MPU battery is changed. Press the self-test button inside the coin door until the display shows feature 18, then use the credit button to set it to 03 for full sound and music.
Systems
Games
Related tips
- Background sound works in test but not in games: check DIPs 29-30, then reseat connectors
- MPU stops before the 7th flash until sound board power is unplugged: replace CR3
- Background sound disappears after the game has been on a while: sound setting
- Only three players allowed on an aftermarket MPU: reseat J1, clear memory, reset DIPs
- Bally MPU loops through its 7 flashes and resets: check R134 and the interrupt traces
- Four switches on one return line dead with good wiring: failed 6821 PIA on the MPU
- Only GI lights and MPU LED never flashes: loose wiring at J3 on the solenoid driver board
- Controlled lamps stuck or not flashing: reflow MPU and lamp driver header pins
Source: Pinball Repair help group!! (Facebook group)