After replacing the MPU memory battery, the adjustments show garbage values and won't scroll properly, and games run past the last ball.

Garbage settings and endless balls after a battery change: do a factory reset

Cause: The memory contents were corrupted when the battery was changed.

Checks

• Power cycle until the factory reset screen can be reached.

Fix

• Run a factory reset, then set the adjustments again.
• On this system a snap-in CR2032 holder is the preferred battery replacement; members said these games do not like AA packs.

Systems

• Gottlieb System 3

Games

• Frank Thomas' Big Hurt

Related tips

• Low battery error comes back a month after a new coin cell: the new cell was bad
• Garbled replay score setting after a battery change: repeat the factory reset
• Reset capacitor workaround for boot garbage

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