Headphone jack in Macbook is only putting out the left channel.

I have no idea how it happened, I just know it happened yesterday. I usually have a line to the stereo, and last night the left speaker was dead.
I tried with some headphones, and lo and behold, dead as well.
Anyone know what could be wrong (and perhaps how to fix it without paying apple a million bucks?)

Yeah, should've mentioned I went there first as well
Have had the slider play games with me before. Not the case today, tho

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