Figure 226. System-board-assembly layout1 System I/O board 2 Firmware and RoT security module 3 Processor board• “Remove the firmware and RoT security module” on page 249• “Install the firmware and RoT security module” on page 251• “Remove the system I/O board or processor board” on page 255• “Install the system I/O board or processor board” on page 259Remove the firmware and RoT security moduleFollow instructions in this section to remove the ThinkSystem V3 Firmware and Root of Trust SecurityModule (firmware and RoT security module).About this taskImportant: This task must be operated by trained technicians that are certified by Lenovo Service. Do noattempt to remove or install it without proper training and qualification.Attention:• Read “Installation Guidelines” on page 47 and “Safety inspection checklist” on page 48 to ensure that youwork safely.Chapter 5. Hardware replacement procedures 249