No sound on computer after I unplug my HDMI cord from tv.

[bronk]

In my case not even the headphones worked.

What finally fixed it was "sfc /scannow"

[SamBufont]

I tried all suggestions on this thread & nothing worked, as the speakers were already showing 'default'. I shutdown, and restarted (still not sound); inserted the audio cord and then removed them once more, and VOILA! 

[koreiryuu]

I know this is kind of old, but I had a similar problem and the only thing that worked for me was going to the Sound menu from Control Panel, right clicking Speakers, then clicking Properties, then the Enhancements tab, then clicking "disable all enhancements".

Even though none of them were actually enabled or anything, when disable is checked, my speakers work. When it's not, my speakers stop working. I'd like to know why this non-sense fix works, but for anyone whos tried everything else, try that.

[Johnildo]

"Kind of" SOLVED

Yeah, I'm having the same issue.

It was only when I unplugged the HDMI. But now it's happening more often...

One option that I've found it is going all the way into the Driver Properties, and Disable and Enable the Realtek Audio Driver.

It is fixing the problem for a while, but it soon comes back to not working... (It needs to reopen Chrome, to refresh the audio on it too.)

It could help someone, but I still wonder for a permanent solution.