Just back from the Apple store. My computer's headphone jack is damaged. My internal speakers don't work because my computer thinks I have headphones plugged in. So the entire logic board needs replacing. I elected not to leave it for repairs today, because they have a HUGE back-to-school rush on repairs and it would take AT LEAST a week to replace right now. The normal wait time for a repair like this is 3-5 days (and they generally overestimate, in my experience). So I've elected to wait until things slow down in a few weeks.