Sound Not Working(and it's not the headphones)

[Tyler2004]

I hooked up a 2nd monitor to my computer and I then got on to play some games. There was no sound in any of the games I played. I took my brothers headphones to see if they worked, nothing. I don't know if it matters, but here is my system build. Also, I can hear sound on teamspeak so not sure what's up. Any help is appreciated.

Thanks!

 

[Tyler2004]

So I unpluged the monitor and sound is working fine now

 

[smorizio]

when you add monitors now by hdmi amd or nvidia hdmi audio output may be installed. if it is you have to change the palyback device from hdmi to speakers. (realteck).