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Power button board
Description Spare part number
Power button board (includes cable) 574493-001
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 41).
5. Remove the following components:
a. Switch cover and keyboard (see
Switch cover and keyboard on page 42)
b. Optical drive (see
Optical drive on page 47)
c. Speakers (see
Speakers on page 49)
d. Palm rest (see
Palm rest on page 50)
e. Hard drive (see
Hard drive on page 52)
f. Display assembly (see
Display assembly on page 59).
g. Top cover (see
Top cover on page 65)
Remove the power button board:
1. Position the top cover upside-down with the rear toward you.
2. Lift the power button board straight up and off the top cover.
Component replacement procedures 67