Dell OptiPlex N, Руководство по обслуживанию

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2-2 Dell OptiPlex N 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 attached to the serial ports, parallel port, and
USB connectors are properly connected.
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 video con-
nector on the back of the computer and to the connector on the back of
the monitor.
For proper connection of the monitor, 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.
8. Inspect the exterior of the computer, including all controls and indica-
tors, for any signs of physical damage.
Does the inspection reveal any problems?
Yes. Refer to the appropriate procedure in Chapter 4, “Removing and
Replacing Parts.”
No. Proceed to the next section, “Observing the Boot Routine.”