4–46 Maintenance and Service Guide
Removal and replacement procedures
TouchPad on/off button board
Before removing the TouchPad on/off button board, 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. Optical drive (see “Optical drive” on page 4-8)
b. Mass storage device (see “Mass storage device” on page 4-10)
c. TV tuner module (see “TV tuner module” on page 4-13)
d. Memory module (see “Memory module” on page 4-16)
e. WLAN module (see “WLAN module” on page 4-17)
f. Switch cover (see “Switch cover” on page 4-21)
g. Keyboard cover (see “Keyboard cover” on page 4-23)
h. Keyboard (see “Keyboard” on page 4-27)
i. Speaker assembly (see “Speaker assembly” on page 4-33)
j. Display assembly (see “Display assembly” on page 4-34)
k. Top cover (see “Top cover” on page 4-41)
Description Spare part number
TouchPad on/off button board (includes cable) 580986-001
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