4–28 Maintenance and Service Guide
Removal and replacement procedures
Top cover
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 4-7).
5. Remove the following components:
a. Accessory cover (see “Mass storage device” on page 4-9)
b. Keyboard (see “Keyboard” on page 4-23)
c. Button board and cable (see “Button board and cable” on page 4-26)
Remove the top cover:
1. Turn the computer upside down, with the front toward you.
2. Remove the following screws:
❏ Three Torx T8M2.5×5.0 screws 1 in the battery bay
❏ Three Torx T8M2.5×6.0 screws 2 in the mass storage device bay
❏ Two Torx T8M2.5×9.0 screws 3 in the RTC battery compartment
Description Spare part number
Top cover with fingerprint reader (includes TouchPad button board and cable, and TouchPad board
and cable)
618840-001
Top cover with no fingerprint reader (includes TouchPad button board and cable, and TouchPad
board and cable)
618841-001
