I have no stereo sound on my MBP, speakers or headphones.
I have a 15 inch MBP from 2010. Just recently I noticed that when I play audio that is different on left and right speakers, it plays it on both sides anyway. I tried Youtube videos, iTunes music, different pairs of headphones, and the built-in speakers. Still it only plays like there is only one speaker attached. Can anyone help me?
MacBook Pro, Mac OS X (10.7.5), 15 in high res dis mid2010 128 hdd