After the CPU battery is changed or relocated, one replay score setting shows odd characters in place of some zeros; the other settings look normal.

Garbled replay score setting after a battery change: repeat the factory reset

Cause: The settings memory was left partly corrupted when power to it was interrupted.

Checks

• Make sure the new battery holder gives the right voltage and polarity at the memory backup point.

Fix

• Do a factory reset; if the setting is still wrong, do it again, then set the game up.

Systems

• Gottlieb System 3

Games

• World Challenge Soccer

Related tips

• Suddenly won't boot, CPU and DMD LEDs solid, display dark: reseat playfield ground plugs
• Low battery / Bad U3 or U6 error and beep loop after a coin cell swap
• Low battery error comes back a month after a new coin cell: the new cell was bad
• Gottlieb System 3 CPU passes test ROM, then watchdog trips: torn trace and wrong parts
• Garbage settings and endless balls after a battery change: do a factory reset
• Where the boards sit in a System 3 dot matrix backbox

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