Touchpad Board - HP ELITEBOOK 840 G4 Maintenance And Service Manual

Touchpad board

Description
Touchpad board without NFC antenna
Touchpad board with NFC antenna
Before removing the touchpad 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 bottom cover (see
5. Remove the battery (see
6. Remove the keyboard (see
7. Remove the internal base plate (see
Remove the touchpad 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 M2.5x2.5 screws (4) that secure the touchpad button
board to the computer.
3. Lift the top of the touchpad board up, and then pull it forward to remove it from the computer (5).
Reverse this procedure to install the touchpad board.
Bottom cover on page
Battery on page 36).
Keyboard on page 47).
Internal base plate on page 50
32).
Component replacement procedures
Spare part number
821171-001
821172-001
57