Samsung Sens NT-R410 Series, Service Manual

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Replace the main board.
7. The Express card is not inserted or the Eject button does not work.
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This may occur when the insulator within the Express card slot is enwrapped.
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Replace the Express card slot frame and check if it is out of order.
8. There is no sound from the speaker.
(Insert the figure of the audio jacks so that the reader can check via the figure.)
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Check if the earphones or headphones are connected to the MIC jack of if there are any alien
substances in the jack.
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Check if the sound is muted after booting up Windows.
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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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4. Troubleshooting
RTC Reset Point will be used from PCB MP1.1.
Because there isn't have RTC Reset Point on the PCB MP1.0, So dissamble
the RTC Battery connector and after 30 seconds when installing.