HP ProBook 4420s HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 72

Palm rest, Remove the switch cover see

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Palm rest Description Palm rest (includes TouchPad) ● For use with fingerprint reader and 33.8-cm (13.3-in) displays ● For use with 33.8-cm (13.3-in) displays ● For use with fingerprint reader and 33.8-cm (13.3-in) displays, red ● For use with 33.8-cm (13.3-in) displays, red ● For use with fingerprint reader and 35.6-cm (14.0-in) displays ● For use with 35.6-cm (14.0-in) displays ● For use with fingerprint reader and 35.6-cm (14.0-in) displays, red ● For use with 35.6-cm (14.0-in) displays, red Spare part number 599549-001 599551-001 607648-001 607650-001 599550-001 599552-001 607649-001 607651-001 Before removing the palm rest, 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 49). 5. Remove the switch cover (see Switch cover on page 51) 6. Remove the keyboard (see Keyboard on page 53) Remove the palm rest: 1. Position the computer right-side up with the front toward you. 2. Remove the three Phillips PM2.5×3.0 broadhead screws (1) that secure the palm rest to the computer. 64 Chapter 4 Removal and replacement procedures

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Palm rest
Description
Spare part number
Palm rest
(includes TouchPad)
●
For use with fingerprint reader and
33.8-cm
(13.3-in) displays
599549-001
●
For use with
33.8-cm
(13.3-in) displays
599551-001
●
For use with fingerprint reader and
33.8-cm
(13.3-in) displays, red
607648-001
●
For use with
33.8-cm
(13.3-in) displays, red
607650-001
●
For use with fingerprint reader and
35.6-cm
(14.0-in) displays
599550-001
●
For use with
35.6-cm
(14.0-in) displays
599552-001
●
For use with fingerprint reader and
35.6-cm
(14.0-in) displays, red
607649-001
●
For use with
35.6-cm
(14.0-in) displays, red
607651-001
Before removing the palm rest, 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
49
).
5.
Remove the switch cover (see
Switch cover
on page
51
)
6.
Remove the keyboard (see
Keyboard
on page
53
)
Remove the palm rest:
1.
Position the computer right-side up with the front toward you.
2.
Remove the three Phillips PM2.5×3.0 broadhead screws
(1)
that secure the palm rest to the
computer.
64
Chapter 4
Removal and replacement procedures