by high external temperatures, system power consumption, power management/battery conservation
configurations, battery fast charging, and software applications. Exhaust air is displaced through the
ventilation grill located on the left side of the computer.
Heat sink
Description
Spare part number
Heat sink (includes thermal material)
443912-001
Thermal Material Kit for use only in all countries and regions except Japan and Asia Pacific
413706-001
Thermal Material Kit for use only in Japan and Asia Pacific countries and regions
445853-001
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 41
).
5
.
Release the keyboard (see
Keyboard on page 56
).
6
.
Remove the switch cover (see
Switch cover on page 62
).
7
.
Remove the fan (see
Fan on page 63
).
Remove the heat sink:
1
.
Remove the four Phillips PM2.0×6.0 screws
(1)
that secure the heat sink to the system board.
2
.
Release the heat sink
(2)
by lifting the right side until it disengages from the processor.
NOTE:
Due to the adhesive quality of the thermal material located between the heat sink and
processor, it may be necessary to move the heat sink from side to side to detach the heat sink from
the processor.
64 Chapter
4
Removal and replacement procedures