HP ProBook 4540s HP ProBook 4540s Notebook PC HP ProBook 4440s Notebook PC HP - Page 76

Position the computer upright with the front toward you., Remove the top cover

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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 42). 5. Remove the following components: a. Bottom door (see Bottom door on page 44). b. Memory modules (see Memory modules on page 50) c. WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 54) d. WWAN module (see WWAN module on page 52) e. Keyboard (see Keyboard on page 56) f. Heat shield (see Heat shield on page 59) Remove the top cover: 1. Position the computer upright with the front toward you. 2. For 4540s models, disconnect the following cables from the system board: (1) Speaker cable (2) Function board/Power button board cable (3) Fingerprint reader board cable 68 Chapter 4 Removal and replacement procedures

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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
42
).
5.
Remove the following components:
a.
Bottom door (see
Bottom door
on page
44
).
b.
Memory modules (see
Memory modules
on page
50
)
c.
WLAN/Bluetooth module (see
WLAN/Bluetooth combo card
on page
54
)
d.
WWAN module (see
WWAN module
on page
52
)
e.
Keyboard (see
Keyboard
on page
56
)
f.
Heat shield (see
Heat shield
on page
59
)
Remove the top cover:
1.
Position the computer upright with the front toward you.
2.
For 4540s models, disconnect the following cables from the system board:
(1)
Speaker cable
(2)
Function board/Power button board cable
(3)
Fingerprint reader board cable
68
Chapter 4
Removal and replacement procedures