Hi all. I would like to announce that my recently brand new. Macbookpro had an issue with the sound card. I hook up my system to a home theather stereo. And after 2 days of working fine, then when I pluged in the headphones, to the jack, I noticed that there is no sound, coming back. But when I unplug the headphones there is sound in the internal speakers of the notebook. I have been searching for an answer these weeks, and found out that there is an issue with the red light coming out from the digital signal, But that has been disabled or turned off, but the sound on the headphone still persist. Please if anyone has any solution for this please help me! If I dont find any possible solution, I will take it to Third Party Support, because I didnt pay the additional money for the apple care support. Im sorry, but next time I will buy it. last but not least, do you guys know if the macbookpro 17 inch, intel has an integrated sound card ? or it can be replaced. Thank you very much for reading. Cheers! Id Software.