HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PC

Palm rest
Description Spare part number
Palm rest (includes TouchPad)
For use in black models:
●
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 33.8-cm (13.3-in) displays 599549-001
●
For use with 33.8-cm (13.3-in) displays 599551-001
For use in red models:
●
For use with fingerprint reader and 35.6-cm (14.0-in) displays 607649-001
●
For use with 35.6-cm (14.0-in) displays 607651-001
● For use with fingerprint reader and 33.8-cm (13.3-in) displays 607648-001
●
For use with 33.8-cm (13.3-in) displays 607650-001
For use in champagne models:
● For use with fingerprint reader and 35.6-cm (14.0-in) displays 625713-001
●
For use with 35.6-cm (14.0-in) displays 625715-001
●
For use with fingerprint reader and 33.8-cm (13.3-in) displays 625712-001
● For use with 33.8-cm (13.3-in) displays 625714-001
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 57).
5. Remove the switch cover (see
Switch cover on page 59)
6. Remove the keyboard (see
Keyboard on page 61)
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.
72 Chapter 4 Removal and replacement procedures