HP CQ40-421AX, CQ40-416TU, CQ40-417TU manual TouchPad button board, Description Spare part number

TouchPad button board

Before removing the TouchPad 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 34).

5.Remove the following components:

a.Hard drive (see Hard drive on page 36)

b.Optical drive (see Optical drive on page 35)

c.Keyboard (see Keyboard on page 44)

d.Keyboard cover (see Keyboard cover on page 46)

e.Speaker assembly (see Speaker assembly on page 49)

f.Display assembly (see Display assembly on page 51)

g.Top cover (see Top cover on page 59)

Remove the TouchPad button board:

1.Turn the top cover upside down with the front toward you.

2.Release the zero insertion force (ZIF) connector for the TouchPad button board cable (1).

3.Remove the three black Phillips PM2.5×3.0 screws (2) and one silver Phillips PM2.5×4.0 screw (3) that secure the TouchPad assembly to the top cover.

4.Remove the TouchPad bracket (4) from the top cover.

62 Chapter 4 Removal and replacement procedures