After installing an NVRAM, the player 1 high score shows strange characters and new high scores go into the second slot instead of the top one.

Garbled top high score after fitting an NVRAM: clear the high score data

Cause: Corrupted high score data carried in memory, not a hardware fault.

Checks

• Run the memory test to confirm the NVRAM works in the game.

Fix

• Use the audit/adjustment items for the high score table to zero the high scores (or restore factory settings), then set the high score levels again.

Systems

• Gottlieb System 80B

Games

• Gold Wings

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