Same happened to me on my macbook pro about a month in from ownership not covered under warranty of course. 950.00 for a new motherboard to have it fixed.
I know this post is old but I'm' pretty sure there are lots of people still in the same boat and i hope you come across this on your travels.
-I tried taking my mac apart to no avail so don't even try.
-the crazy glue thing i didn't even try.
-i had been using the griffin imic for about a year hooked up to my home
stereo, which works great in overriding the 3.5 jack but the problem there
is that they are super expensive and both of them just stopped working after a few months. JUNK.
-today i picked up a veho speaker with tongle which works and is portable. don't expect
great sound but its decent, but they are also expensive and cheaply made. But i have
sound again!! the veho tongle hooks directly into the usb port. No hassle work by bluetooth. time will tell
how this little thing stands the test of time but we will see.
i hope this helps some other poor souls out there in cyberspace?!