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When installing an external option, see “Locating connectors, controls, and indicators on the front of your
computer” on page 75 and “Locating connectors on the rear of your computer” on page 76 to identify the
required connector. Then, use the instructions that come with the option to help you make the connection
and install any software or device drivers that are required for the option.
Removing the computer cover
CAUTION:
Turn off the computer and wait three to ve minutes to let the computer cool before removing the
computer cover.
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the Safety, Warranty, and Setup Guide that came with your computer. To obtain a copy of the Safety, Warranty, and
Setup Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to remove the computer cover.
To remove the computer cover, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Disconnect the power cords, Input/Output cables, and any other cables that are connected to the
computer. See “Locating connectors, controls, and indicators on the front of your computer” on page
75
and “Locating connectors on the rear of your computer” on page 76.
3. Remove any locking device that secures the computer cover, such as a padlock or a Kensington-style
cable lock.
4. Remove the two screws that secure the computer cover and slide the computer cover to the rear to
remove it.
Figure 59. Removing the computer cover
126 ThinkCentre E93 Hardware Maintenance Manual