Evidence

٢.           .
٣.  fn+f4        :
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  :       .
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:             .
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:              .
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  :       .
      fn+f4.
:        Extend )(    
     . control panel )  (    
 Control Panel ) (   Appearance and Personalization )  
 .( Display ) (  Adjust resolution ) .(
  HDMI
HDMI           .   HDMI 
    HDMI     :
١.     Speakers )  (       
 Playback devices ) .(
٢.   Playback ) (    .
٣.  Set Default ) (    OK ).(
      :
١.     Speakers )  (       
  Playback devices ) .(
٢.   Playback )(   Speakers ) .(
٣.  Set Default ) (    OK ).(
  ٣٠