4–44 Maintenance and Service Guide
Removal and replacement procedures
Heat sink
✎The heat sink spare part kit includes replacement thermal material.
Before removing the 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 4-6).
5. Remove the following components:
a. Hard drive (see “Hard drive” on page4-8)
b. Optical drive (see “Optical drive” on page4-18)
c. Keyboard and switch cover (see “Keyboard and switch cover” on page4-20)
d. Speaker (see “Speaker” on page4-24)
e. Display assembly (see “Display assembly” on page 4-25)
f. Top cover (see “Top cover” on page4-32)
g. System board (see “System board and optical drive connector board” on page4-35)
Description Spare part number
For use only on computer models equipped with an AMD processor:
■For use only on computer models equipped with a graphics subsystem with discretememory 538459-001
■For use only on computer models equipped with a graphics subsystem with UMAmemory 538456-001
For use only on computer models equipped with an Intel processor:
■For use only on computer models equipped with a graphics subsystem with discretememory 538458-001
■For use only on computer models equipped with a graphics subsystem with UMAmemory 538457-001