Samsung NP-R70xxxx Series, Руководство по обслуживанию

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4.
Troubleshooting
8. There is no sound from the speaker.
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Check if the sound is muted after booting up Windows.
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Control panel
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Sound, Check if the default output is "Speaker".
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Check the connection status of the speaker cable and check if the speaker is out of order.
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Check if there is a magnetic object near the speaker.
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Replace the main board.
9. I cannot hear sound through the headphones.
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Check if the sound is muted in Windows.
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Turn the volume up.
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Replace the main board
10. Internal MIC or External MIC isn't work.
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Check the sound driver and setting.
Like below picture, Check if the default record device is "MIC" at the Control panel
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Sound.
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In case of Internal MIC, Check the MIC connection.
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