HP ProBook 4740s HP ProBook 4740s Notebook PC - Maintenance and Service Guide - Page 84

Latch assembly, The latch mechanism includes a small spring. Note the location of the spring.

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Latch assembly NOTE: The Latch Kit includes the left and right latches, knob, screws, and spring. Description Latch Kit Spare part number 684635-001 Before removing the latch assembly, 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. Fan (see Fan on page 57) h. System board (see System board on page 63) NOTE: The latch mechanism includes a small spring. Note the location of the spring. Remove the latch assembly: 1. Position the computer upright and open as far as possible. 2. Remove the spring (1) from the tab on the base enclosure (2). 76 Chapter 4 Removal and replacement procedures

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Latch assembly
NOTE:
The Latch Kit includes the left and right latches, knob, screws, and spring.
Description
Spare part number
Latch Kit
684635-001
Before removing the latch assembly, 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.
Fan (see
Fan
on page
57
)
h.
System board (see
System board
on page
63
)
NOTE:
The latch mechanism includes a small spring. Note the location of the spring.
Remove the latch assembly:
1.
Position the computer upright and open as far as possible.
2.
Remove the spring
(1)
from the tab on the base enclosure
(2)
.
76
Chapter 4
Removal and replacement procedures