Every time the game is switched on it goes straight into audit mode, and after stepping through the tests it returns to the first audit instead of starting the game.

Game always powers up in audit mode: bad 5101 memory chip

Cause: The 5101 CMOS memory chip on the CPU board (or the traces to it) has failed, so the game finds its settings invalid at every power-up.

Checks

• Confirm the backup voltage reaches the memory (battery or holder voltage at the blocking diode).
• Inspect the area around the 5101 for corrosion or broken traces.

Fix

• Replace the 5101, or fit an NVRAM replacement and remove the batteries.

Systems

• Williams System 4

Games

• World Cup

Related tips

• Leon's test EPROM fitted but the LEDs do not start flashing
• Game powers up in audit mode instead of attract mode
• Boots into audit mode every power-up with good batteries: bad 5101 RAM
• Locks up when a second game is started: bad 5101 RAM
• Keep spare 6800, 6821 and 5101 chips
• 5101 RAM at U8 fails often; speed matters
• Two flashes only: U8 5101 RAM
• Game keeps resetting: replace the 5101 RAM (an NVRAM works)

Source: Pinball Repair help group!! (Facebook group)