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v The riser-card assemblies with adapters (see “Removing a PCI riser-card
assembly” on page 167)
v The SAS riser card and controller assembly (see “Removing the SAS riser
card and controller assembly” on page 200)
6. If an Ethernet daughter card is installed in the server, remove it.
7. If a virtual media key is installed in the server, remove it. (See “Removing a
virtual media key” on page 185 for instructions).
8. Remove the air baffles (see “Removing the DIMM air baffle” on page 177 and
“Installing the microprocessor 2 air baffle” on page 176).
Important: Note which DIMMs are in which connectors, before you remove the
DIMMs. 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 186).
10. Remove the fans and fan bracket (see “Removing a hot-swap fan” on page
196 and “Removing the fan bracket” on page 198).
11. Disconnect all cables from the system board.
Attention: 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 instead.
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 216).
13. Push in and lift up the two system board release latches on either side of the
fan cage.
14. Slide the system board forward and tilt it away from the power supplies. Using
the lift handle, pull the system board out of the server.
15. If you are instructed to return the system board, follow all packaging
instructions, and use any packaging materials for shipping that are supplied to
you.
Installing the system board
Notes:
1. When you reassemble the components in the server, be sure to route all cables
carefully so that they are not exposed to excessive pressure.
2. When you replace the system board, you must either update the server with the
latest firmware or restore the pre-existing firmware that the customer provides
on a diskette or CD image.
226 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual