HP ProBook 4540s HP ProBook 4540s Notebook PC HP ProBook 4440s Notebook PC HP - Page 52

Bottom door, to release the service door.

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Bottom door Description Bottom door for use in 4540s models Bottom door for use in 4440s/4441s models Spare part number 690978-001 690979-001 Before disassembling the computer, 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). Remove the bottom door: 1. Position the computer upside-down on a flat surface with the battery bay toward you. 2. With the battery bay toward you, remove the security screw (1) (if the security screw is being used). For additional information about the security screw, see Using the optional security screw on page 43. 3. Slide the service door release latches (2) to release the service door. NOTE: You can slide the service door release latches simultaneously or you can slide them one at a time. 4. Slide the service door towards the front of the computer (3) and then lift it (4) away from the computer. Reverse the removal procedures to install the bottom door. 44 Chapter 4 Removal and replacement procedures

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Bottom door
Description
Spare part number
Bottom door for use in 4540s models
690978-001
Bottom door for use in 4440s/4441s models
690979-001
Before disassembling the computer, 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
).
Remove the bottom door:
1.
Position the computer upside-down on a flat surface with the battery bay toward you.
2.
With the battery bay toward you, remove the security screw
(1)
(if the security screw is being
used). For additional information about the security screw, see
Using the optional security screw
on page
43
.
3.
Slide the service door release latches
(2)
to release the service door.
NOTE:
You can slide the service door release latches simultaneously or you can slide them
one at a time.
4.
Slide the service door towards the front of the computer
(3)
and then lift it
(4)
away from the
computer.
Reverse the removal procedures to install the bottom door.
44
Chapter 4
Removal and replacement procedures