MacBook Pro Headphone Jack Red Light (Speakers work, headphones muted)

[GREENH3ART]

Already been asked I think, but the answers are all in slightly different contexts from mine. MacBook Pro 2007 17". My speakers work fine, but my headphone jack has the red light on in it and the headphone sound is muted. I found a command to turn the light off, but the sound is still muted. I'm triple-booting Lion, Win7, Ubuntu and I have had this problem in Win7 before. Help? I need not only to turn the light off, but I need it to be turned off BECAUSE the headphones are working. Thank you.

[Caltac]

Have you tried using alsamixer to mute some of the channels? For me, on my Macbook Pro 7-1, I muted something called spdif-1 (or something similar) and that turns off the red light, while leaving everything else unmuted.