Mac Air -first no sound, now it won't charge

First the sound went out on my macbook air. I was in the airport and tried everything I knew, nothing worked. Then I went to plug into an outlet I found, and realized it wasn't charging. It does supply enough power to use the laptop, but there is no light on the maglite charger. I tried SMC reset (pram as well), heating up the maglite unit, and a few other random things. Anyone have any ideas?