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Power button board
Description Spare part number
Power button board 725451-001
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 service cover (see
Service cover on page 30).
5. Remove the battery (see
Battery on page 32).
6. Remove the fan (see
Fan on page 45).
7. Remove the card reader board (see
Card reader board on page 44).
8. Remove the system board (see
System board on page 47).
Remove the power button board and cable:
1. Remove the Phillips PM2.0×2.0 broadhead screw (1) and the Phillips PM2.5×3.5 screw (2) that
secures the right hinge to the computer.
2. Remove the power button board (3) from the computer.
NOTE: The power button board cable is soldered onto the board.
52 Chapter 4 Removal and replacement procedures