Base enclosure
Description Spare part number
Base enclosure (includes 4 rubber feet, battery release latch assembly, service cover release latch
assembly, and replacement thermal material)
685403-001
Before removing the base enclosure, 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 44), and then remove the following components:
a. Service cover (see
Service cover on page 46)
b. Bluetooth module (see
Bluetooth module on page 48)
c. Speaker assembly (see
Speaker assembly on page 50)
d. Optical drive (see
Optical drive on page 51)
e. Hard drive (see
Hard drive on page 52)
f. Fan (see
Fan on page 54)
g. WWAN module (see
WWAN module on page 55)
h. Modem module (see
Modem module on page 62)
i. Keyboard (see
Keyboard on page 63)
68 Chapter 4 Removal and replacement procedures
