Dell Precision T5400 (Late 2007) - Manual (Page 181)

Adding and Replacing Parts 181
NOTICE: If you are installing a processor upgrade kit from Dell, return the original
heat-sink assembly and processor to Dell in the same package in which your
replacement kit was sent. If you are not installing a processor upgrade kit from Dell,
reuse the original heat-sink assembly when you install your new processor.
7 Open the processor cover by sliding the release lever from under the center
cover latch on the socket. Then, pull the lever back to release the processor.
1 heat-sink assembly 2 captive screw housing (4)
1
2