Touchpad button board
Description Spare part number
Touchpad button board 821668-001
Touchpad button board w/NFC antenna 821667-001
Before removing the touchpad button board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 32).
5. Remove the battery (see Battery on page 35).
6. Remove the system board (see System board on page 49).
Remove the touchpad button board:
1. Disconnect the cable from the touchpad to the smart card reader board (1), and then disconnect the NFC
antenna from the NFC module (2).
2. Lift the tape, and then remove the 3 Phillips PM2.5x3.0 screws (3) that secure the touchpad button
board to the top cover.
3. Lift the bottom of the touchpad button board up, and then pull it forward to remove it from the slot (4).
Reverse this procedure to install the touchpad board.
56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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