Lenovo H30-00 Desktop - Manual (Page 45)

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User Guide
Removing the computer cover
Attention: Turn off the computer and wait 3 to 5 minutes to let it cool
down before removing the cover.
To remove the computer cover:
1. Remove any media (disks, CDs, or memory cards) from the drives, shut down
your operating system, and turn off the computer and all attached devices.
2. Unplug all power cords from electrical outlets.
3. Disconnect all cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer. Refer to “Locating connectors on the rear of the computer”.
4. Remove the 2 screws that secure the computer cover at the rear of the
chassis.
5. Slide the computer cover toward the rear of the chassis to remove.
Note: For this procedure, it helps to lay the computer on a flat, stable
surface.