Dell Inspiron 7500 System Reference Manual page 8

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Audio Devices: Dell™ Inspiron™ 7500
You can connect speakers, a microphone, headphones, and record/playback devices such as cassette players, CD players, and VCRs to the
audio connectors on the computer. The connectors are located directly under the PC Card slot. Dell recommends using amplified speakers for the
best sound.
Connect headphones or speakers to the headphone connector on the right of the audio connectors. Connect a microphone to the microphone-in
connector in the middle. Connect record/playback devices such as cassette players, CD players, and VCRs to the line-in connector on the left.
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You can control the sound coming from the external speakers and the computer's integrated speakers with the volume control dial. You can also
use the keyboard to adjust the volumes. Press
disable both the integrated and external speakers.
NOTE: If no sound comes from the speakers, make sure that the sound is not disabled. Press
control dial.
See Drivers for information about reinstalling the audio drivers. The drivers are located on the Dell Inspiron 7500 System Software CD.
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98 documentation for the location of sound application programs such as mixers and volume control.
to lower the volume. Press to increase the volume. Press
and check the volume
to enable or