Lenovo ThinkCentre M57p - Manual (Page 20)

Installing internal options
Important
Read “Handling static-sensitive devices” on page 4 before opening the
computer cover.
Opening the cover
Important
Turn off the computer and wait 3 to 5 minutes to let the computer cool
before opening the computer cover.
To open 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 “Locating controls and connectors on the front of your
computer” on page 5 and “Locating connectors on the rear of your computer”
on page 6.
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.
Figure 5. Pivoting the cover
12 ThinkCentre Hardware Installation and Replacement Guide