Eight-flash LED code meanings

1: 6803 (U1) internal RAM. 2: U3 game ROM checksum. 3: U4 6116 RAM. 4: U8 6821 PIA-0. 5: U7 6821 PIA-1. 6: U1 internal timer. 7: phase B lamp logic (U8, U12 4584), fed through power supply fuse F5. 8: phase A zero-cross logic (U1, U11 4011, U12 4584), fed through fuse F4. No flash after a given count means the next test failed.

Systems

• Bally 6803

Games

• Beat the Clock
• Eight Ball Champ
• Lady Luck

Related tips

• How to read the flashes on pre-1988 6803 games
• Expected CPU LED flashes by game
• CPU LED stops just short of the full count
• How to read the flashes on the last four 6803 games
• Game boots but will not take credits or start
• Nonsense adjustment values after a battery failure
• Factory CPU jumpers by game
• CPU never starts: check the reset line at U1 pin 6

Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)