4-30 Sun Fire X4450 Server Service Manual • November 2009
Caution – This procedure requires that you handle components that are sensitive to
electrostatic discharge. This discharge can cause server components to fail. To avoid
damage, ensure that you follow the antistatic practices as described in Section 2.7,
“Performing Electrostatic Discharge and Antistatic Prevention Measures” on
page 2-9.
Caution – This procedure requires removing the server from the
rack. The server is heavy. Two people are required to remove it
from the rack.
4.8.1 Removing the Motherboard Assembly
You need a No. 2 Phillips screwdriver.
1. Power off the server.
See Section 2.4, “Powering Off the Server” on page 2-3.
2. Remove the server from the rack.
See Section 2.6, “Removing the Server From the Rack” on page 2-7.
3. Attach an antistatic wrist strap.
See Section 2.7, “Performing Electrostatic Discharge and Antistatic Prevention
Measures” on page 2-9.
4. Remove the top cover.
See Section 2.8, “Removing the Top Cover” on page 2-11.
5. Remove the memory tray.
See Section 4.2.1, “Removing the Memory Tray” on page 4-11.
6. Remove the air duct.
See Section 4.4.1, “Removing the Air Duct” on page 4-17.
7. Remove the PCIe cards and risers.
See Section 4.5.1, “Removing a PCIe Riser” on page 4-20. Note the location of
expansion cards in the PCIe risers.
8. Disconnect the power distribution board ribbon cable.
9. If you are replacing the motherboard, remove the memory board tray supports.
Use a No. 2 Phillips screwdriver.
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