Basically, my idiotic brother managed to snap the end of his headphones off in my MacBook. Thus meaning that I cannot plug anything in or use the jack, no problems there as I didn't really use it anywho. However, my Mac seems to believe that there is something plugged into the headphone socket, and refuses to use the internal speakers, and there appears to be no way around in system preferences. After some research it appears that it's some firware issue, so I was wondering whether it would be possible to create a firmware update yourself that would overide the headphone jack and default sound through the internal speakers despite something being plugged in. It's either this or I take the MacBook apart, and I'm trying to exhaust all other options before trying that.