Why might the values in BIOS not be saved and appear in manufacturing mode?

The reason the values in BIOS may not be saved and instead display in manufacturing mode is due to the systemboard jumper being in the SERVICE_MODE state. This setting indicates that the system is in a temporary mode designed for testing and diagnostics, which can prevent the BIOS configurations from being saved permanently. Service mode is typically used during the manufacturing process or for maintenance purposes to ensure that settings can be adjusted without making permanent changes to the BIOS.

Other choices may seem plausible but do not explain the behavior in this scenario. A fully charged BIOS battery would typically ensure that saved settings remain intact. An outdated firmware version might lead to other issues, but it wouldn't directly cause BIOS settings to revert to manufacturing mode. Unsupported memory modules could lead to system instability or boot issues but would not impact the BIOS saving settings unless they prevented the system from starting correctly.