upgrading and repairing PCs technicians ... - 400 Bad Request

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Chapter 10—Video and Audio
Table 10.25 Troubleshooting Display Problems Continued
Symptom Cause Solution
CRT monitor—wrong Check settings; reduce refresh rate
refresh rate. until acceptable picture quality is
achieved.
Use onscreen picture adjustments
until an acceptable picture quality is
achieved.
Intermittent—not If the problem can be fixed by
due to external waiting or gently tapping the side of
interference. the monitor, the monitor power
supply is probably bad or has loose
connections internally; service or
replace the monitor.
Picture in DOS, Incorrect or corrupted Boot Windows 9x in Safe Mode;
not Windows Windows video driver. boot Windows 2000 in Enable VGA
Mode. If these display modes work,
delete current video card from
Device Manager and restart system
to reinstall drivers. If incorrect drivers
are selected by Windows, manually
choose correct drivers in Device
Manager.
Audio I/O Connectors
Sound cards, or built-in audio chips, provide another significant
part of modern PCs’ multimedia capabilities. Learning the correct
uses for the basic input/output connectors will help you as you set
up typical sound-equipped computers. See Chapter 14 for examples
of these connectors.
• Stereo line out or audio out connector—The line out
connector is used to send sound signals from the audio
adapter to a device outside the computer, such as stereo
speakers, a headphone, or a stereo system. Some adapters
provide two jacks for line out: one for the left channel and
the other for the right channel.
• Stereo line or audio in connector—With the line in
connector, you can record or mix sound signals from an
external source, such as a stereo system or VCR, to the computer’s
hard disk.
• Speaker/headphone connector—The speaker/headphone
connector is provided on most audio adapters, but
not necessarily all of them. Some systems use line out
instead. When the adapter provides both a speaker/headphone
and a line out connector, the speaker/headphone