A World Cup CPU board fitted with the standard System 3 white flipper ROMs does not boot.
World Cup will not boot on standard white flipper ROMs
Cause: World Cup uses its own flipper ROM at IC17 that differs from the standard white one.
Checks
- Check which flipper ROM is fitted at IC17.
Fix
- Fit the World Cup flipper ROM at IC17 (a 2716 burned from the World Cup image).
Systems
Games
Related tips
- World Cup will not boot after a CPU board swap
- Which System 3 to 7 games use which flipper ROM system
- Extra sound lines on World Cup and Disco Fever
- System 3 CPU board ROM layout
- Flipper ROM color codes by system
- Flipper ROM colour tells you the system generation
- Is it the CPU board or the driver board? Boot the CPU alone
- Board boots and passes SW1, but no displays or CPU lamps
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)