Heat sink assembly
Description Spare part number
For use only on computer models equipped with Intel processors and switchable discrete graphics 742582-001
For use only on computer models equipped with Intel processors and UMA graphics 742581-001
For use only on computer models equipped with Intel HM76 chipset and switchable discrete
graphics
742331-001
For use only on computer models equipped with Intel HM76 chipset and UMA graphics 742330-001
Heat sink for use only on computer models equipped with AMD processors and UMA graphics 19
W
734448-001
Heat sink for use only on computer models equipped with AMD processors and AMD UMA
graphics 25 W
734449-001
Heat sink for use only on computer models equipped with AMD processors and switchable
discrete graphics 19 W
734450-001
Heat sink for use only on computer models equipped with AMD processors and switchable
discrete graphics 25 W
734451-001
Before removing the heat sink assembly, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
Battery on page 49), and then remove the following components:
a. Optical drive (see
Optical drive on page 55)
b. Service door (see
Service door on page 50)
c. WLAN module (see
WLAN module on page 53)
d. Memory module (see
Memory module on page 51)
e. Keyboard (see
Keyboard on page 62)
f. Top cover (see
Top cover on page 67)
g. Hard drive (see
Hard drive on page 71)
h. System board (see
System board on page 80)
i. Fan (see
Fan on page 89)
Component replacement procedures
91