Service Manual

The external visual inspection consists of a quick inspection of the exterior of the system, the monitor, the
keyboard, any peripherals, and cables. While performing the visual inspection, make any necessary
corrections. To perform the external visual inspection, perform the following steps:
1. Turn off the system, the monitor, and all peripherals.
2. Verify that all power cables are properly connected to the system, 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 system.
For a PS/2-compatible mouse, the keyboard and mouse interface cable connectors are identical
except for their labels.
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 network cables (if present) are properly attached.
5. Verify that any devices attached to the serial port connectors are properly connected.
Each of the serial port interface cables must be firmly attached to an appropriate connector on the
back of the system 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.
6. Verify that the video interface cable is firmly attached to the video connector on the back of the system
or the video expansion card (if installed), and also to the connector on the back of the monitor. For
proper connection of the video monitor, see the documentation for the monitor.
7. Inspect all external monitor controls for any obvious damage or improper settings. For proper settings
of the video monitor controls, see the documentation for the monitor.