front panel tabs (3)

bezel

Figure 2-2. Removing the Bezel

4.Place the cover on the computer, and slide it toward the front of the computer.

5.Replace the screws that you removed when you removed the computer cover.

6.If you are using a padlock to secure your system, reinstall the padlock.

7.Replace the bezel.

8.Place the computer in its stand.

CAUTION: Your system is designed to work only in a vertical orientation using the stand shipped with the computer. Do not attempt to operate the system lying flat on a desktop, and do not set heavy objects such as a monitor on top of the computer.

Inside Your Computer

Figure 2-3 shows the computer with its cover removed as an aid in locating internal features and components.

When you look inside your computer, note the DC power cables coming from the power supply. These cables supply power to the system board and to internal drives.

The flat ribbon cables are the interface cables for internal drives. An interface cable con- nects a drive to an interface connector on the system board.

The system board—the large printed circuit board secured to the left side of the chassis—holds the computer’s control circuitry and other electronic components. Some hardware options are installed directly onto the system board.

2-4 Dell Dimension 900 System Reference and Troubleshooting Guide

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Dell 900 manual Inside Your Computer, Removing the Bezel