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  • Reset all BIOS settings to defaults and retest... Look in Device Manager for any unknown devices or anything with an X or ! next to it. You could also try to boot-up a Linux distribution on a USB stick. Also, the audio chipset is embedded on the mainboard, there is nothing to check internally. If the audio hardware is bad, a replacement mainboard is likely the only fix.
    – acejavelin
    Commented Feb 11, 2018 at 16:05
  • If the audio hardware is bad, a USB audio adapter is a less expensive alternative to replacing the mainboard.
    – fred_dot_u
    Commented Feb 11, 2018 at 16:10
  • @fred_dot_u Cheaper maybe... but I actually use my laptop as a "mobile" device, and I sure don't want another dongle hanging off the side. I alkready break 2 or 3 Logitech Unifying Receivers every year, don't really need something else hanging out the side. When you put your laptop in and out of your bag a dozen times a day, it's easy to forget to remove dongles, thumb drivers, etc. once in a while.
    – acejavelin
    Commented Feb 11, 2018 at 17:06