Centaur, Fathom and Fireball II start-up switches

Centaur (5 balls): all zeros with flickering displays; check 1 and 2 (trough 4 and 5) and 8 (outhole). Fathom (3 balls): will not start, blank displays; check 1 (outhole), 2 and 3 (left of outhole). Fireball II (3 balls): will not start, blank displays; check 1 (outhole), 2 and 3 (left of outhole) and 18 (right of outhole).

Systems

• Bally MPU AS-2518-35

Related tips

• Elektra: start-up switches
• Multiball game will not start: ball or trough switch out of place
• Embryon: outhole switches
• Vector: trough switches
• Boots with 7 flashes but won't start a game or play its tune: outhole ball switch
• Game starts but will not serve a ball to the shooter lane

Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)