Lenovo ThinkSystem SR635 V3 User Manual page 202

• This task must be operated by trained technicians that are certified by Lenovo Service. Do no attempt to
remove or install it without proper training and qualification.
• If you need to replace a processor board and a firmware and RoT security module together, do the
following:
– Check the current PSB fuse policy before replacement. See Service process before replacement at
Service process for updating PSB fuse
– Ensure that the processor fuse status is expected without unexpected XCC event logs after
replacement. See Service process after replacing a processor board and a firmware and RoT security
module together at
The following illustration shows the layout of the system board assembly which contains the firmware and
RoT security module, system I/O board, processor board, fan board and PIB board.
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state.
Service process for updating PSB fuse state.