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6. Remove the top cover (2) by lifting it straight up.
Reverse this procedure to install the top cover.
Power button board
Description Spare part number
Power button board (includes cable) 636448-001
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 mode,
turn on the computer, and then shut it down using the operating system.
2. Disconnect all of the external devices that are 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 32).
5. Remove the service cover (see
Hard drive on page 33).
6. Remove the keyboard (see
Keyboard on page 43).
7. Remove the top cover (see
Top cover on page 45).
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 mode,
turn on the computer, and then shut it down using the operating system.
2. Disconnect all of the external devices that are 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 32).
46 Chapter 4 Removal and replacement procedures ENWW