LG G3 Music/Media Volume Issues

So I recently bought and LG G3 and I love it, but just yesterday the audio stopped working. Not the entire audio, only the games/music volume. The ringtone, notification, and touch sounds all work. It just won't let me adjust the music and games volume. I went to the settings to manually adjust it, but it won't let me. I've searched everywhere and I've seen lots of people having sound issues, but none pike mine. Help? :/

In the first instance, try a Soft Reset...Power Off and Restart, which on the G3 is easy to do: just long-press the power button and the options will appear.

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