IBM LS21 - BladeCenter - 7971, Service Manual

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Removing and replacing FRUs
FRUs must be installed only by trained service technicians.
The illustrations in this document might differ slightly from your hardware.
Removing a microprocessor and heat sink
Read the following important guidelines before removing a microprocessor that is
not faulty (for example, when you are replacing the system board assembly).
Attention: Do not use an alcohol wipe with the microprocessor.
If you are not replacing a defective heat sink or microprocessor, the thermal
material on the heat sink and microprocessor will remain effective if you complete
the following steps:
1. Carefully handle the heat sink and microprocessor when removing or installing
these components. Do not touch the thermal material or otherwise allow it to
become contaminated.
2. In a dual-microprocessor blade server or MPE unit, the microprocessor and the
heat sink are a matched set. First transfer the heat sink and microprocessor
from one socket to the new system board; then, transfer the other heat sink and
microprocessor. (This will make sure that the thermal material remains evenly
distributed between each heat sink and microprocessor.)
Notes:
v
The heat-sink FRU is packaged with the thermal material applied to the
underside. This thermal material is not available as a separate FRU. The heat
sink must be replaced when new thermal material is required, such as when a
defective microprocessor is replaced or if the thermal material is contaminated or
has come in contact with another object other than its paired microprocessor.
v
The microprocessor FRU for this blade server and MPE unit includes a heat sink.
v A heat-sink FRU can be ordered separately if the thermal material becomes
contaminated.
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BladeCenter LS21 Type 7971 and LS41 Type 7972: Problem Determination and Service Guide