System 7: step past audit 50 to reach attract mode
On System 7, keep pressing the coin door Advance button to step through the audits; somewhere past audit 50 the game stops and drops back to attract mode. If it lands back in audits, step on further. A game that never gets to attract may have a faulty resistor network in its memory protect circuit besides the 5101. Earlier systems just loop back to audit 0.
Systems
Related tips
- Game powers up in audit mode
- Audit mode with under 3.6 V at the RAM
- Battery holder looks fine but makes no contact
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)