IBM BladeCenter HS20 7981 Problem Determination And Service Manual page 92

5. Carefully close the lever to secure the microprocessor in the socket.
6. Install a heat sink on the microprocessor.
7. Install the bezel assembly (see "Installing the bezel assembly" on page 61).
8. Install the blade server cover (see "Installing the blade server cover" on page
76
BladeCenter HS20 Type 7981: Problem Determination and Service Guide
Attention: Make sure that the microprocessor is oriented and aligned correctly
in the socket before you try to close the lever.
Note: The microprocessor FRU comes with a new heat sink, do not install a
used heat sink with a new microprocessor.
Attention:
v Do not set down the heat sink after you remove the plastic cover.
v Do not touch the thermal material on the bottom of the heat sink. Touching
the thermal material will contaminate it. If the thermal material on the
microprocessor or heat sink becomes contaminated, you must replace the
heat sink.
a. Remove the plastic protective cover from the thermal material on 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 place 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.
REPEAT SEQUENCE
UNTIL TIGHT.
720°
60).
Heat Sink
Microprocessor 2
Microprocessor 1
and Heat Sink
720°