Sony VGC-RC300 - Manual (Page 157)

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Troubleshooting
Speakers
What should I do if my speakers do not work?
❑ Make sure your speakers are properly connected and the volume is turned up loud enough to hear sound.
❑ Make sure your speakers are designed for computer use.
❑ If your speakers have a muting button, set the button to off.
❑ The speaker volume may have been turned off. Press the muting button on your keyboard.
❑ If your keyboard also has a volume control, make sure the volume is turned up loud enough to hear sound.
❑ If you have connected an audio cable to the headphones jack, disconnect the cable and use the speaker cable supplied
with your speakers.
❑ If your speakers require external power, make sure the speakers are connected to a power source. See the manual that
came with your speakers for more information.