no audio device connected to your PC in dell vostro 14

Well I will suggest you to update the audio Driver of your PC to it latest version some time an outdated driver can also be the reason of this issue.

Having same issue here dont know what had happened actually if it was after a bios update or Windows update totally frustrated. DELL BIOS update cycle gives schedule to have an update on May 2025 hoping to fix the issue. Mine is Dell Inspiron 3501 with cirrus CS8409 audio codec

Also please detail your issue, such as when it occurs like after sleep? or long idle? and restarting fixes the issue or you see an exclamation mark with high-definition audio or cirrus cs8409 or Cirrus logic superior high-definition audio all these can be visible 

when you visit device manager just input it start menu and open to see if it's being visible.