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4. Troubleshooting
→ Check if there is magnetic material near speaker.
→ Replace the main board.
8. I cannot hear sound through the headphones.
→ Check if the sound is muted in Windows.
→ Turn the volume up.
→ Replace the main board.
9. HDD is not recognized.
→ Check the connection status of the HDD FPC cable. R eplace the FPC and check if it is out of
order.
→ If the 'Operating system not found' message appears during the booting process even though
the HDD is recognized by CMOS, the operating system of the HDD may be corrupted or the
HDD is out of order. In this case, format the HDD and reinstall the operating system or replace
the HDD with a new one.
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