Lenovo ThinkEdge SE450 Maintenance Manual page 158

Procedure
Step 1. Make preparations for this task.
1. If applicable, remove the security bezel (see
2. Remove the top covers (see
3. Remove the air baffle (see
4. Remove the fan cage assembly (see
5. Remove both PCIe riser assemblies (see
page 100).
6. Remove the M.2 boot adapter (see
7. Remove the OCP adapter (see
8. Remove both power supply units (see
9. Remove the power backplane (see
10. Remove the intrusion switch cable (see
11. Remove all the memory modules (see
12. Remove the Root of Trust Module (see
on page 166).
13. Remove the processor and heat sink (see
14. Disconnect all the cables from the system board.
Step 2. Pull the plunger up; then, hold the plunger and the handle, and slide the system board slightly
forward to disengage it from the chassis.
Figure 146. Disengaging the system board
Step 3. Rotate the right end of the system board up to remove the system board from the chassis.
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"Remove the security bezel" on page
"Remove the top covers" on page
"Remove the air baffle" on page
"Remove the fan cage assembly" on page
"Remove the PCIe riser assemblies and adapters" on
"Remove the M.2 boot adapter and drives" on page
"Remove the OCP Ethernet adapter" on page
"Remove a hot-swap power supply unit" on page
"Remove the power backplane" on page
"Remove the intrusion switch with cable" on page
"Remove a memory module" on page
"Remove the Firmware and TPM 2.0 Security Module"
"Remove the processor and heat sink" on page
137).
168).
43).
72).
95).
120).
84).
90).
124).
77).
127).