Sound Broken on Macbook pro 2009

I have a 13'' macbook pro from 2009 and for some reason the sound is not working. The sound icon and slider look normal and operate normally but the sound does not want to play. Also, I do not have a red light coming out of the headphone jack.

1. Reset PRAM.  http://support.apple.com/kb/PH4405
2. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
3. Applications > Utilities > Audio MIDI Setup
    Audio Devices window
    Side Bar
    Click the Built-in Output.
    Under Mute any of the boxes checked? If so, uncheck it.

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