Specifications

e. Fan (see Fan on page 74)
f. Heat sink (see
Heat sink on page 75)
g. Base enclosure (see
Base enclosure on page 79)
h. Display assembly (see
Display assembly on page 84)
i. System board (see
System board on page 91)
Remove the Power button board assembly:
1. Position the top cover upside-down, with the front toward you.
2. Remove the single Phillips PM2.5×3.0 screw (1) that secures the assembly to the top cover.
3. Remove the Power button board and cable (2) from the top cover.
Reverse this procedure to install the Power button board assembly.
Wireless/web/mute function board
NOTE: The Wireless/web/mute function board assembly spare includes the power button cable.
Description Spare part number
Wireless/web/mute function board assembly 639480-001
Before removing the Wireless/web/mute function board assembly, 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.
96 Chapter 4 Removal and replacement procedures