Power button board
Description Spare part number
Power button board (includes cable) 720553-001
Before removing the power button board, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
Battery on page 34), and then remove the following components:
a. Service cover (see
WLAN module on page 35)
b. Hard drive (see
Hard drive on page 38)
c. Base enclosure (see
Base enclosure on page 45)
d. System board (see
System board on page 56)
Remove the power button board:
1. Detach the power button board cable (1) from the top cover. (The power button board cable is attached
to the top cover with double-sided tape.)
2. Remove the Phillips PM2.0×2.9 screw (2) that secures the power button board to the top cover.
3. Release the clip (3) that secures the power button board to the top cover.
4. Remove the power button board (4).
Reverse this procedure to install the power button board.
72 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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