HT2494 the sound won't work on my Macbook pro  the headphone port actually has a red light coming from it

Can not get sound on my Computer.  The headphone port actually has a red light coming from it.  Help

Insert a headphone jack and remove it and see if the light goes out. The red light indicates the switch didn't switch from head phone to your Mac's speakers. Some folks have actually used a match stick to undo the switch.

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