Andre Boot test ROM flash codes
Each LED flash marks one chip passing. 0: CPU locked. 1: IC13 6810 bad. 2: IC16 6810 bad. 3: IC19 CMOS RAM bad. 4: IC18 PIA bad. 5: IC11 PIA bad. 6: IC10 PIA bad. 7: IC5 PIA bad. 8: interrupt circuit bad (needs a jumper at 1J4). 9: all good on System 3-6, or IC36 PIA bad on System 7. 10: all good on System 7. A CPU alone flashes five times when good.
Systems
Related tips
- Flipper ROM color codes by system
- Only Stellar Wars and Flash used yellow flipper ROMs
- Flash has yellow and green game ROM versions; match them to the flipper ROMs
- Board boots and passes SW1, but no displays or CPU lamps
- Blanking stays low: timer, C31 and Q5
- "Flipper ROMs" have nothing to do with the flippers
- Which System 3 to 7 games use which flipper ROM system
- Leon code running but LEDs dark: bad CPU PIA IC18
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)