Opening the cover
Important
Turnoff your computer and wait 3 to 5 minutes to let the computer cool
before opening the computer cover.
1. Remove any media (diskettes, CDs, or tapes) from the drives, shut down your
operating system, and turn off all attached devices and the computer.
2. Unplug all power cords from electrical outlets.
3. Disconnect the cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer. See “Frontconnectors” on page 150 and “Rear connectors” on page
151.
4. Remove any locking devices, such as a cable lock that secures the computer
cover.
5. Press the buttons on the sides of the computer and pivot the cover upward to
open the computer.
154 HardwareMaintenance Manual