5.
Release the ZIF connector (1) and disconnect the power switch cable (2).
6. Rotate the top cover up (1) and off the base enclosure (2).
Reverse this procedure to install the top cover.
Power switch board
The spare part number for the power switch board used in all models is 605794-001.
Before removing the power switch 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.
82 Chapter 4 Removal and replacement procedures