Dell OptiPlex 360 (Late 2008) - Manual (Page 102)

102 Processor
4 Align the pin-1 corners of the processor and socket.
CAUTION: To avoid damage, align the processor properly with the socket, and do
not use excessive force when you install the processor.
5 Gently seat the processor in the socket, ensuring it is positioned correctly.
6 Close the processor cover, ensuring the tab on the processor cover is
positioned underneath the center cover latch on the socket.
7 Pivot the socket release lever back towards the socket and snap it into place
to secure the processor.
8 Clean the thermal grease from the bottom of the heat sink.
CAUTION: Always apply new thermal grease. New thermal grease is critical for
ensuring adequate thermal bonding, which is a requirement for optimal processor
operation.
9 Apply new thermal solution to the top of the processor.
10 Replace the processor fan and heat sink assembly (see "Replacing the
Processor Heat-Sink Assembly" on page 87).
CAUTION: Ensure that the processor fan and heat sink assembly is correctly
seated and secure.
11 Follow the procedure in "After Working on Your Computer" on page 17.
12 Verify if your computer works correctly by running the Dell™ Diagnostics
(see "Dell Diagnostics" on page 136).