Removal and replacement procedures 4–32
TouchPad on/off button board and board bracket
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. Hard drive (see “Hard drive” on page 4-10)
c. Keyboard (see “Keyboard” on page 4-17)
d. Keyboard cover (see “Keyboard cover” on page 4-20)
e. Power button board (see “Power button board” on page 4-22)
f. Display assembly (see “Display assembly” on page 4-23)
Remove the TouchPad on/off button board and board bracket:
1. Turn the top cover upside down, with the front toward you.
2. Release the ZIF connector on the TouchPad on/off button board to which the TouchPad on/off board cable is
attached, and then disconnect the TouchPad on/off board cable 1 from the TouchPad button board.
3. Release the ZIF connector on the TouchPad button board to which the TouchPad on/off board cable is attached,
and disconnect the TouchPad on/off board cable 2 from the TouchPad board.
4. Remove the two Phillips PM2.0x4.0 screws 3 securing the TouchPad on/off button board.
5. Single-sided and double-sided tape is used to help secure the TouchPad on/off button board to the TouchPad
board bracket. Release the TouchPad on/off button board from the tape, and then remove the TouchPad on/off
button board 4.
Description Spare Parts Number
TouchPad board bracket 489119-001
TouchPad on/off button board (includes cables) 496832-001
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