HP 240 HP 450 Notebook PC and HP 455 Notebook PC Maintenance and Service Guide - Page 71

Top cover, When replacing the top cover, be sure that the following components are removed from

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Top cover NOTE: The top cover spare part kit includes the TouchPad. However, it does not include the TouchPad cables. The TouchPad cables are included with the TouchPad button board. For more information on the TouchPad button board, see TouchPad button board on page 69. Description Top cover for use in charcoal models Top cover for use in black models Spare part number 685762-001 713530-001 Before removing the top cover, 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 41), and then remove the following components: ● Memory module/wireless module compartment cover (see WLAN module on page 49) ● Hard drive (see Hard drive on page 54) ● Keyboard (see Keyboard on page 60) NOTE: When replacing the top cover, be sure that the following components are removed from the defective top cover and installed on the replacement top cover: ● Power button board and cable (see Power button board on page 67) ● TouchPad button board and cables (see TouchPad button board on page 69) To remove the top cover: 1. Close the computer, and then turn the computer upside down with the front toward you. Component replacement procedures 63

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Top cover
NOTE:
The top cover spare part kit includes the TouchPad. However, it does not include the
TouchPad cables. The TouchPad cables are included with the TouchPad button board. For more
information on the TouchPad button board, see
TouchPad button board
on page
69
.
Description
Spare part number
Top cover for use in charcoal models
685762-001
Top cover for use in black models
713530-001
Before removing the top cover, 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
41
), and then remove the following components:
●
Memory module/wireless module compartment cover (see
WLAN module
on page
49
)
●
Hard drive (see
Hard drive
on page
54
)
●
Keyboard (see
Keyboard
on page
60
)
NOTE:
When replacing the top cover, be sure that the following components are removed from the
defective top cover and installed on the replacement top cover:
●
Power button board and cable (see
Power button board
on page
67
)
●
TouchPad button board and cables (see
TouchPad button board
on page
69
)
To remove the top cover:
1.
Close the computer, and then turn the computer upside down with the front toward you.
Component replacement procedures
63