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Microprocessors are to be removed only by trained service technicians.
Attention:
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 Use the microprocessor installation tool that comes with the new microprocessor
to remove and install the microprocessor from the server.
Microprocessor
Heat sink
To remove a microprocessor and heat sink, complete the following steps:
Procedure
1. Read the safety information that begins with “Safety” on page v, “Handling
static-sensitive devices” on page 100, and “Installation guidelines” on page 97.
2. Turn off the server and peripheral devices and disconnect the power cord and
all external cables.
3. Remove the top cover (see “Removing and replacing consumable parts and
Tier 1 CRUs” on page 105).
4. Remove the top cover bracket (see “Removing the top-cover bracket” on page
107).
5. Rotate the heat-sink release lever 1 to the fully open position.
162 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
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