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Power button board
Description Spare part number
Power button board (includes cable) 727504-001
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 37).
5. Remove the battery (see
Battery on page 39).
6. Remove the fan (see
Fan on page 55).
7. Remove the card reader board (see
Card reader board on page 54).
8. Remove the system board (see
System board on page 57).
Remove the power button board and cable:
1. Remove the Phillips PM2.5×3.5 screw (1) and the Phillips PM2.5×5.5 screw (2) that secures the
right hinge to the computer.
2. Rotate the hinge upward to gain access to the power button board (3).
64 Chapter 4 Removal and replacement procedures