Lenovo THINKCENTRE 9120 User Manual download pdf (Page 19)

Chapter 3. Installing options and replacing hardware

This chapter provides an introduction to the features and options that are available

for your computer. You can expand the capabilities of your computer by adding

memory, adapters, or drives. When installing an option, use these instructions

along with the instructions that come with the option.

Attention

Do not open your computer or attempt any repair before reading the “Important safety

information” in the Safety and Warranty Guide that was included with your computer. To

obtain a copy of the Safety and Warranty Guide, go to the Support Web site at

http://www.lenovo.com/support.

Note: Use only parts provided by Lenovo.

Installing external options

External speakers, a printer, or a scanner can be connected to your computer. For

some external options, you must install additional software in addition to making

the physical connection. When adding an external option, see “Locating connectors

on the rear of your computer” on page 6 and “Locating controls and connectors on

the front of your computer” on page 5 to identify the required connector, and then

use the instructions that are included with the option to help you make the

connection and install any software or device drivers that are required for the

option.

Removing the cover

Important

Turn off the computer and wait 3 to 5 minutes to let the computer cool

before removing the computer cover.

This section provides instructions on how to remove 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.

Lenovo THINKCENTRE 9120 User Manual Page 19