IBM LS42 - BladeCenter - 7902 Installation And User Manual page 42

12. Install a heat sink on the microprocessor.
13. If you have other optional devices to install or remove, do so now; otherwise,
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BladeCenter LS22 and LS42 Type 7901 and 7902: Installation and User's Guide
e. Center the microprocessor over the microprocessor socket. Align the
notches on both sides of the microprocessor with the notches in the socket
and carefully put the microprocessor into the socket.
f. Carefully close the microprocessor retainer.
g. Rotate the locking lever on the microprocessor socket to the closed and
locked position. Make sure that the lever is secured in the locked position
by the tab on the microprocessor socket.
Attention:
v Do not set down the heat sink after you remove the plastic cover.
v Do not touch the thermal grease on the bottom of the heat sink. Touching
the thermal grease will contaminate it. If the thermal grease on the
microprocessor or heat sink becomes contaminated, contact your service
technician.
a. Remove the plastic protective cover from the bottom of the heat sink.
b. Make sure that the thermal material is still on the bottom of the heat sink;
then, align and put the heat sink on top of the microprocessor in the
retention bracket, thermal material side down. Press firmly on the heat
sink.
c. Align the four screws on the heat sink with the holes on the heat-sink
retention module.
d. Press firmly on the captive screws and tighten them with a screwdriver.
Follow the pattern that is shown on the following label. Rotate each screw
two full rotations each time. Repeat the sequence until the screws are tight.
Do not overtighten the screws by using excessive force.
go to "Completing the installation" on page 46.