Removing and replacing FRUs
FRUs must be installed only by trained service technicians.
The illustrations in this document might differ slightly from the hardware.
Removing a microprocessor and heat sink
Attention:
v Always use the microprocessor installation tool to remove a microprocessor.
Failing to use the microprocessor installation tool may damage the
microprocessor sockets on the system board. Any damage to the microprocessor
sockets may require replacing the system board.
v Do not allow the thermal grease on the microprocessor and heat sink to come in
contact with anything. Contact with any surface can compromise the thermal
grease and the microprocessor socket.
v Dropping the microprocessor during installation or removal can damage the
contacts.
v Do not touch the microprocessor contacts; handle the microprocessor by the
edges only. Contaminants on the microprocessor contacts, such as oil from your
skin, can cause connection failures between the contacts and the socket.
To remove a microprocessor and heat sink, complete the following steps:
1. Read the safety information that begins on page vii, “Handling static-sensitive
devices” on page 171, and “Installation guidelines” on page 169.
2. Turn off the server and peripheral devices and disconnect the power cord and
all external cables.
3. Remove the cover (see “Removing the cover” on page 177).
4. Depending on which microprocessor you are removing, remove the following
components, if necessary:
v Microprocessor 1: PCI riser-card assembly 1 and DIMM air baffle (see
“Removing a PCI riser-card assembly” on page 188 and “Removing the
DIMM air baffle” on page 180)
v Microprocessor 2: PCI riser-card assembly 2 and microprocessor 2 air baffle
(see “Removing a PCI riser-card assembly” on page 188 and “Removing the
microprocessor 2 air baffle” on page 178).
5. Open the heat-sink release lever to the fully open position.
238 IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide
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