Installing External Options; Opening The Computer Cover - Lenovo ThinkCentre M90 3244 User Manual

Installing external options

You can connect external options to your computer, such as external speakers, a
printer, or a scanner. For some external options, you must install additional
software in addition to making the physical connection. When installing an
external option, see "Locating connectors on the front of your computer" on page 7
and "Locating connectors on the rear of your computer" on page 8 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.

Opening the computer cover

This section provides instructions on how to open the computer cover.
CAUTION:
Turn off the computer and wait three to five minutes to let the computer cool
before opening the computer cover.
To open the computer cover, do the following:
1. Remove any media from the drives and turn off all attached devices and the
2. Disconnect all power cords from electrical outlets.
3. Disconnect the power cords, Input/Output (I/O) cables, and any other cables
4. Remove any locking device that secures the computer cover, such as an
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User Guide
Attention
Do not open your computer or attempt any repair before reading and
understanding the "Important safety information" in the ThinkCentre Safety
and Warranty Guide that came with your computer. To obtain a copy of the
ThinkCentre Safety and Warranty Guide, go to:
http://www.lenovo.com/support
computer.
that are connected to the computer. See "Locating connectors on the front of
your computer" on page 7 and "Locating connectors on the rear of your
computer" on page 8.
integrated cable lock. See "Integrated cable lock" on page 39.