Can't get internal speakers to work

I can't get my built in speakers to work. I checked in my sound preferences and optical digital out port is the only thing there. I haven't a clue and thought I'd ask here and see what all you amazingly smart peeps had to say
Thanks so much!!
and there is no red light coming from the plug in hole

System Preference > Sound > Output > Internal Speakers
Make sure Mute is not enabled.
Option click the speaker icon in the menu bar and see whether the internal is selected or not.
If you see red light in the headphone port, plug the headphone
in and out of the port 5 or 6 times to flip the microswitch inside.
Sound output may be stuck in the digital mode.
Reset PRAM.  http://support.apple.com/kb/PH4405
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".
Best.

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