HP ProBook 4740s HP ProBook 4740s Notebook PC - Maintenance and Service Guide - Page 76

Optical drive extension board

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Optical drive extension board Description Optical drive extension board Spare part number 689656-001 Before removing the optical drive extension 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 33). 5. Remove the following components: a. Bottom door (see Bottom door on page 34). b. Hard drive (see Hard drive on page 38) c. Optical drive (see Optical drive on page 36) d. WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 43) e. Keyboard (see Keyboard on page 45) f. Top cover (see Top cover on page 47) g. Speaker assembly (see Speaker assembly on page 58) h. Fan (see Fan on page 57) i. System board (see System board on page 63) Remove the optical drive extension board: 68 Chapter 4 Removal and replacement procedures

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Optical drive extension board
Description
Spare part number
Optical drive extension board
689656-001
Before removing the optical drive extension 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
33
).
5.
Remove the following components:
a.
Bottom door (see
Bottom door
on page
34
).
b.
Hard drive (see
Hard drive
on page
38
)
c.
Optical drive (see
Optical drive
on page
36
)
d.
WLAN/Bluetooth module (see
WLAN/Bluetooth combo card
on page
43
)
e.
Keyboard (see
Keyboard
on page
45
)
f.
Top cover (see
Top cover
on page
47
)
g.
Speaker assembly (see
Speaker assembly
on page
58
)
h.
Fan (see
Fan
on page
57
)
i.
System board (see
System board
on page
63
)
Remove the optical drive extension board:
68
Chapter 4
Removal and replacement procedures