Specifications

Base enclosure
Description Spare part number
Base enclosure 639468-001
Before removing the base enclosure, 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 49).
5. Disconnect the wireless antenna cables from the WLAN module (see
WLAN module
on page 52) and the WWAN module (see WWAN module on page 68).
6. Remove the keyboard (see
Keyboard on page 65).
7. Remove the fan (see
Fan on page 74).
8. Remove the heat sink (see
Heat sink on page 75).
Remove the base enclosure:
1. Position the computer right-side up, with the front toward you.
2. Remove the Two Torx T8M2.5×7.0 screws from under the keyboard.
3. Position the computer right-side up, with the rear toward you.
Component replacement procedures 79