Maintenance and Service Guide

Power button board
Description Spare part number
Power button board (includes cable) L28661-001
Before removing the power button board, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o 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 bottom cover (see Bottom cover on page 33).
5. Remove the battery (see Battery on page 35).
6. Remove the system board (see System board on page 59).
Remove the power button board:
1. Remove the three Phillips M2.5×4.5 screws (1) from the right hinge.
2. Rotate the hinge upward (2).
3. Lift the Mylar from on top of the board (1).
4. Remove the two Phillips M2.0×3.0 screws (2) that secure the board to the computer.
64 Chapter 5 Removal and replacement procedures for authorized service provider parts