Sony pcg-k315b Manuel D’Utilisation
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Using your VAIO computer
Troubleshooting sound
My speakers are not producing sound
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The built-in speakers may be turned off. Press <Fn>+<F2> to turn on the speakers.
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The speaker volume may be turned to the minimum. Press <Fn>+<F4> to increase the volume.
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If your computer is powered by battery, check that the battery is inserted properly and that it is charged.
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If you are using an application that has its own volume control, check that the volume is turned up.
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Check the volume controls in Windows.