• 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 state.
– 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
Service process for updating PSB fuse state.
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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ThinkSystem SR635 V3 User Guide
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