Sound does not work

  1. System: Windows
  2. Model: UN4501
  3. Frequency of occurrence: all the time

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Detailed description:

Today I updated the graphic driver's bios after updating the graphics it was all good. But when I installed new bios my sound just died and I don't even see the device in the device manager so I can't update, the audio drivers. And I even can't go back to a bios version because this is not supported. Please help me I am losing my mind.

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