Top cover
NOTE: All top covers include the touchpad assembly.
Description Spare part number
Top cover for use in model 4540s:
With a fingerprint reader 683506-001
Without a fingerprint reader 683507-001
For use in model 4440s/4441s:
With a fingerprint reader 683666-001
Without a fingerprint reader 683667-001
Before removing the top cover, 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 55).
5. Remove the following components:
a. Bottom door (see
Bottom door on page 58).
b. Memory modules (see
Memory modules on page 64)
c. WLAN/Bluetooth module (see
WLAN/Bluetooth combo card on page 68)
d. WWAN module (see
WWAN module on page 66)
e. Keyboard (see
Keyboard on page 70)
f. Heat shield (see
Heat shield on page 73)
Remove the top cover:
1. Position the computer upright with the front toward you.
82 Chapter 4 Removal and replacement procedures
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