Touchpad button board
Description Spare part number
Touchpad button board for HP 745 821171-001
Touchpad button board w/NFC antenna 821172-001
Touchpad button board for HP 755 836620-001
Touchpad button board w/NFC antenna for HP 755 837851-001
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 34).
5. Remove the battery (see Battery on page 39).
6. Remove the following components:
a. Keyboard (see Keyboard on page 50)
b. Hard drive (Hard drive on page 40)
c. Internal base plate (Internal base plate on page 55)
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 (3), and then remove the 2 Phillips PM2.5x2.5 screws (4) that secure the touchpad button
board to the top cover.
Component replacement procedures 65
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