Dell Precision 400 Service Manual (.pdf) - Page 38

External Visual Inspection, Features

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External Visual Inspection The external visual inspection consists of a quick inspection of the exterior of the computer, the monitor, the keyboard, any peripherals, and cables. While performing the visual inspection, make any necessary corrections. To perform the external visual inspection, follow these steps: 1. Turn off the computer, the monitor, and all peripherals. 2. Verify that all power cables are properly connected to the computer, the monitor and peripherals, and their power sources. 3. Verify that the keyboard and mouse interface cables are firmly attached to the proper connectors on the back of the computer. For a PS/2-compatible mouse, the keyboard and mouse interface cable connectors are identical except for their labels. If needed, see "System Features" in Chapter 1. For a serial mouse, the mouse interface cable must be firmly attached to one of the serial port connectors, and its captive screws must be secure enough to ensure a firm connection. 4. Verify that any devices connected to the serial ports, parallel port, and USB connectors are properly attached. Each of the serial, parallel, and USB interface cables must be firmly attached to an appropriate connector on the back of the computer as well as to the interface connector on the device. The captive screws that secure these connectors at each end of the interface cable must be secure enough to ensure a firm connection. 5. Verify that the video interface cable is firmly attached to the connector on the video expansion card and to the connector on the back of the monitor. For proper monitor connections, see the documentation for the monitor. 6. Inspect all external monitor controls for any obvious damage or improper settings. For proper settings of the monitor controls, see the documentation for the monitor. 7. Inspect the keyboard to ensure that no keys are sticking. If one or more keys are sticking, it may be necessary to replace the keyboard. 2-2 Dell WorkStation 400 Systems Service Manual

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2-2
Dell WorkStation 400 Systems Service Manual
E
xternal Visual Inspection
The external visual inspection consists of a quick inspection of the exterior of
the computer, the monitor, the keyboard, any peripherals, and cables. While per-
forming the visual inspection, make any necessary corrections. To perform the
external visual inspection, follow these steps:
1.
Turn off the computer, the monitor, and all peripherals.
2.
Verify that all power cables are properly connected to the computer, the
monitor and peripherals, and their power sources.
3.
Verify that the keyboard and mouse interface cables are firmly
attached to the proper connectors on the back of the computer.
For a PS/2-compatible mouse, the keyboard and mouse interface cable con-
nectors are identical except for their labels. If needed, see “System
Features” in Chapter 1.
For a serial mouse, the mouse interface cable must be firmly attached to one
of the serial port connectors, and its captive screws must be secure enough
to ensure a firm connection.
4.
Verify that any devices connected to the serial ports, parallel port, and
USB connectors are properly attached.
Each of the serial, parallel, and USB interface cables must be firmly
attached to an appropriate connector on the back of the computer as well as
to the interface connector on the device. The captive screws that secure
these connectors at each end of the interface cable must be secure enough to
ensure a firm connection.
5.
Verify that the video interface cable is firmly attached to the connector
on the video expansion card and to the connector on the back of the
monitor.
For proper monitor connections, see the documentation for the monitor.
6.
Inspect all external monitor controls for any obvious damage or
improper settings.
For proper settings of the monitor controls, see the documentation for the
monitor.
7.
Inspect the keyboard to ensure that no keys are sticking.
If one or more keys are sticking, it may be necessary to replace the
keyboard.