Power button board
Description Spare part number
Power button board (includes cable) 774599-001
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 top cover (see
Top cover on page 28).
5. Disconnect the battery.
Remove the power button board:
1. Disconnect the power button board cable (1) from the system board.
2. Remove the Phillips PM2.5×4.0 screw (2) that secures the power button board to the computer.
Component replacement procedures 45
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