6. Reconnect the external cables; then, reconnect the power cords and turn on the
peripheral devices and the server.
Removing the system board
To remove the system board, complete the following steps.
1. Read the safety information that begins on page vii and “Installation guidelines”
on page 169.
2. Turn off the server, and disconnect all power cords and external cables.
3. Pull the power supplies out of the rear of the server, just enough to disengage
them from the server.
4. Remove the server cover (see “Removing the cover” on page 177).
5. Remove the following components and place them on a static-protective
surface for reinstallation:
v The riser-card assemblies with adapters (see “Removing a PCI riser-card
assembly” on page 188)
v The SAS riser-card and controller assembly (see “Removing the SAS
riser-card and controller assembly” on page 197)
6. If an Ethernet adapter is installed in the server, remove it.
7. If a virtual media key is installed in the server, remove it (see “Removing an
IBM virtual media key” on page 185 for instructions).
8. Remove the air baffles (see “Removing the DIMM air baffle” on page 180 and
“Removing the microprocessor 2 air baffle” on page 178).
Important: Before you remove the DIMMs, note which DIMMs are in which
connectors. You must install them in the same configuration on the
replacement system board.
9. Remove all DIMMs, and place them on a static-protective surface for
reinstallation (see “Removing a memory module (DIMM)” on page 217).
10. Remove the fans (see “Removing a hot-swap fan” on page 223).
11. Disconnect all cables from the system board (see “Internal cable routing and
connectors” on page 172).
Attention:
v In the following step, do not allow the thermal grease to come in contact
with anything, and keep each heat sink paired with its microprocessor for
reinstallation. Contact with any surface can compromise the thermal grease
and the microprocessor socket; a mismatch between the microprocessor
and its original heat sink can require the installation of a new heat sink.
v Disengage all latches, release tabs or locks on cable connectors when you
disconnect all cables from the system board. Please refer to “Internal cable
routing and connectors” on page 172 for more information. Failing to release
them before removing the cables will damage the cable sockets on the
system board. The cable sockets on the system board are fragile. Any
damage to the cable sockets may require replacing the system board.
12. Remove each microprocessor heat sink and microprocessor; then, place them
on a static-protective surface for reinstallation (see “Removing a
microprocessor and heat sink” on page 238).
13. Push in and lift up the two system-board release latches on each side of the
fan cage.
Chapter 5. Removing and replacing server components 247
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