HP ProBook 4540s HP ProBook 4540s Notebook PC HP ProBook 4440s Notebook PC HP - Page 87

Function board/Power button board assembly, Speaker see

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Function board/Power button board assembly Description Function board/Power button board assembly for use in 4540s models (includes cable) Function board/Power button board for use in 4440s/4441s models (includes cable) Spare part number 683486-001 683653-001 Before removing the function board and power button 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 42). 5. Remove the following components: a. Bottom door (see Bottom door on page 44). b. Keyboard (see Keyboard on page 56) c. Top cover (see Top cover on page 67) d. Speaker (see Speaker assembly on page 76) Remove the function board/power button board assembly: 1. Position the top cover upside-down with the front toward you. 2. Remove the two Phillips PM2.0×4.0 screws (1) that secure the boards to the top cover. 3. Remove the function board from the top cover (2). Component replacement procedures 79

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Function board/Power button board assembly
Description
Spare part number
Function board/Power button board assembly for use in 4540s models (includes cable)
683486-001
Function board/Power button board for use in 4440s/4441s models (includes cable)
683653-001
Before removing the function board and power button 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
42
).
5.
Remove the following components:
a.
Bottom door (see
Bottom door
on page
44
).
b.
Keyboard (see
Keyboard
on page
56
)
c.
Top cover (see
Top cover
on page
67
)
d.
Speaker (see
Speaker assembly
on page
76
)
Remove the function board/power button board assembly:
1.
Position the top cover upside-down with the front toward you.
2.
Remove the two Phillips PM2.0×4.0 screws
(1)
that secure the boards to the top cover.
3.
Remove the function board from the top cover
(2)
.
Component replacement procedures
79