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Removal and replacement procedures
Maintenance and Service Guide 4–19
Power button board
Before removing the display assembly, 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 4-6).
5. Disconnect the wireless antenna cables from the WLAN module (see “WLAN module” on page 4-13).
6. Remove the keyboard (see “Keyboard” on page 4-15).
7. Remove the keyboard cover (see “Keyboard cover” on page 4-17).
Remove the power button board:
8. Remove the two Phillips PM1.5x3.0 screws 1 that secure the power button board to the keyboard cover.
9. Remove the power button board 2.
Reverse this procedure to install the power button board.
Description Spare part number
Power button board 489116-001