Sound problem with macbook pro! help please

hi guys!!
my mac sound is not working also the headphones however if i plug the hdmi cable it works on my tv !!!!! I think it is a hardware problem!!
what do you think guys !!!!

Hi a,
Have you checked the settings in System Preferences > Sound?
There is a switch inside the audio jack that may be stuck. Try gently inserting an audio plug, gently wiggling it, and then removing the audio plug.
See if this discussion helps: https://discussions.apple.com/message/16201033#16201033

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