HP ProBook 4420s HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 68

Speakers

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Speakers Description Speakers for use in computer models with 33.8-cm (13.3-in) displays Speakers for use in computer models with 35.6-cm (14.0-in) displays Spare part number 599566-001 605559-001 Before removing the speakers, 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 and keyboard (see Switch cover on page 51). Remove the speakers: 1. Position the computer right-side up with the front toward you. 2. Disconnect the speaker cable (1) from the system board. NOTE: The two speakers are connected with a single cable. 3. Remove the two Phillips PM2.5×3.0 screws (2) that secure the speakers to the base enclosure. 4. Remove the speaker cable from the clips and routing channel, and then remove the speakers from the computer (3). 60 Chapter 4 Removal and replacement procedures

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Speakers
Description
Spare part number
Speakers for use in computer models with
33.8-cm
(13.3-in) displays
599566-001
Speakers for use in computer models with
35.6-cm
(14.0-in) displays
605559-001
Before removing the speakers, 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 and keyboard (see
Switch cover
on page
51
).
Remove the speakers:
1.
Position the computer right-side up with the front toward you.
2.
Disconnect the speaker cable
(1)
from the system board.
NOTE:
The two speakers are connected with a single cable.
3.
Remove the two Phillips PM2.5×3.0 screws
(2)
that secure the speakers to the base enclosure.
4.
Remove the speaker cable from the clips and routing channel, and then remove the speakers
from the computer
(3)
.
60
Chapter 4
Removal and replacement procedures