My MacBook Pro (Mid-2009) digital output has stopped working. It turns on the red light at the other side of the plug, but fails to connect with my receiver. Output from Airport works fine.
It was working fine until now, and now suddenly, the sound is gone. I've tried PRAM and SMC reset. Nothing works.
Using the same cable with my airport express, through airplay, the sound comes out fine.
It wasn't working when on Mavericks, nor now, on Yosemite.
MacBook Pro, OS X Yosemite (10.10)