HP ProBook 4520s HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 66

Power button board

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7. Remove the optical drive bracket (2). Reverse this procedure to reassemble and install an optical drive. Power button board Description Switch cover with power button board For use in computers with 17.3-in displays For use in computers with 15.6-in displays Spare part number 598675-001 598674-001 Before removing the 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 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 58 Chapter 4 Removal and replacement procedures

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7.
Remove the optical drive bracket
(2)
.
Reverse this procedure to reassemble and install an optical drive.
Power button board
Description
Spare part number
Switch cover with power button board
For use in computers with 17.3-in displays
598675-001
For use in computers with 15.6-in displays
598674-001
Before removing the 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
50
).
5.
Remove the switch cover and keyboard (see
Switch cover and keyboard
on page
51
).
58
Chapter 4
Removal and replacement procedures