Heat sink
NOTE: Replacement thermal material is included with all heat sink spare part kits.
Description Spare part number
For use only with computer models equipped with processors with 3- or 6-MB L2 cache 468593-001
For use only with computer models equipped with processors with 2- or 4-MB L2 cache 450593-001
Before removing the processor heat sink, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 44).
5. Remove the following components:
a. Keyboard (see
Keyboard on page 60)
b. Switch cover (see
Switch cover on page 67)
c. Fan/heat sink assembly (see
Fan/heat sink assembly on page 70)
Remove the processor heat sink:
1. Loosen the four Phillips PM2.5×7.0 screws (1) that secure the processor heat sink to the base
enclosure.
2. Lift the right side of the processor heat sink (2) until it disengages from the processor.
3. Release the processor heat sink (3) by sliding it to the right until it clears the base enclosure.
4. Remove the processor heat sink.
74 Chapter 4 Removal and replacement procedures
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