I recently picked up a very nice Junk Yard (WPC 95). The game will not keep track of time while the game is turned off. Once turned on, it starts keeping time from where it left off. All high scores and settings are saved. The MPU has not been modified in any way and has no alkaline damage. The board is pristine.
Am I missing a setting? Weak batteries?
My future plans include replacing the battery pack with a lithium button cell upgrade.