Currently Being ModeratedJan 19, 2013 9:12 AM (in response to cavneb)
If you see a red light in the audio output port, then the headphones will be receiving the audio signal. When you insert and pullout your headphones you are probably tripping an internal switch that was stuck and now enables the sound to come from the internal speakers. This is a normal solution to that problem, but really should not occur. A trip to the Apple store genius bar might be a good idea. You still must be within the warranty period.
Currently Being ModeratedJan 19, 2013 11:43 AM (in response to cavneb)
I probably shouldn't have marked this solved. I am not seeing a red light on the audio out port (headphone jack). There are no other lights anywhere that show up. I will however take it to the apple store to see if they can figure it out. Thanks for your help!
Currently Being ModeratedJan 19, 2013 12:02 PM (in response to cavneb)
Understood, but there is no way of retracting the solved/helped marker. It may be that the retina MBP does not show a red light as the 'normal' ones do. However the insertion of the headphone jacks is one of the solutions to get the internal speakers functioning again. Bringing it to the Apple store is the proper step.