htc one won't play music

[Jerk]

I have tried to adjust the volume level, but it stays at 0. The letter x displays on the speaker icon. Any suggestions?

 

[DroidXcon]

I have tried to adjust the volume level, but it stays at 0. The letter x displays on the speaker icon. Any suggestions?

Welcome to Android Central, have you simply tried rebooting?

 

[Scott Kenyon]

Settings/Sound/Sound profile
Set it to normal if it isn't. If it is, set it to silent, then set it to normal and try again. Report back if it works or doesn't work.