Lenovo 5458 Installation And Service Manual page 269

Removing a microprocessor and heat sink
Use this information to remove a microprocessor and heat sink.
Before you begin
The following notes describe the type of microprocessor that the server supports
and other information that you must consider when you install a microprocessor
and heat sink:
v The server supports one Intel land grid array (LGA) 1150 dual-core or quad-core
microprocessor. The type, speed, and L3 cache of the microprocessor depends on
the server model.
v Read the documentation that comes with the microprocessor to determine
whether you have to update the server firmware. To download the most current
level of server firmware, go to http://www.ibm.com/supportportal and
http://www.ibm.com/support/fixcentral.
v The microprocessor uses an integrated voltage regulator on the system board.
Attention:
v Microprocessors are to be installed only by trained technicians.
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.
v The pins on the sockets are fragile. Any damage to the pins might require
replacing the system board.
Read the safety information in "Safety" on page v and "Installation guidelines" on
page 31.
If you are replacing a server component in the server, you need to slide the server
out from the rack enclosure, turn off the server and peripheral devices, and
disconnect the power cords and all external cables.
About this task
To remove a microprocessor and heat sink, complete the following steps.
Procedure
1. Remove the cover (see "Removing the cover" on page 33).
2. Remove the air baffle if installed (see "Removing the air baffle" on page 34).
3. Remove the heat sink:
CAUTION:
The heat sink may become very hot during normal operation. Allow time for
the heat sink to cool down before you touch it.
a. Loosen the screws and alternate among the screws until they break the seal
with the microprocessor.
b. Press firmly on the captive screws and loosen them with a screwdriver.
Chapter 6. Removing and replacing server components
253