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Heat sink
NOTE: The heat sink spare part kit includes replacement thermal material.
Description Spare part number
For use only on computer models equipped with an AMD processor 720576-001
For use only on computer models equipped with the Intel HM87 chipset and a GeForce 750M
graphics subsystem
720542-001
For use only on computer models equipped with the Intel HM87 chipset and a GeForce 740M
graphics subsystem
722389-001
For use only on computer models equipped with the Intel HM87 chipset and a graphics subsystem
with UMA memory
720541-001
For use only on computer models equipped with the Intel HM77 chipset and a graphics subsystem
with discrete memory
720540-001
For use only on computer models equipped with the Intel HM77 chipset and a graphics subsystem
with UMA memory
720539-001
Before removing the heat sink, 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 43), and then remove the following components:
a.
Solid-state drive (see
Solid-state drive on page 44)
b. Hard drive (see
Hard drive on page 47)
c. Base enclosure (see
Base enclosure on page 55)
d. Display assembly (see
Display assembly on page 57)
e. Fan (see
Fan on page 65)
f. System board (see
System board on page 66)
Remove the heat sink:
1. Turn the system board upside down, with the front toward you.
NOTE: Steps 2 and 3 apply to computer models equipped with an AMD processor and a
graphics subsystem with discrete memory.
2. Following the 1 through 7 sequence stamped into the heat sink, loosen the four Phillips
PM2.0×11.0 captive screws (2) and the three Phillips PM2.0×7.5 captive screws (3) that secure
the heat sink to the system board.
72 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts