I have a silicon bead jammed in my head phone jack so the computer always things there are headphones plugged in. I have tried a PRAM reset and starting up a new project in garage band. Is there any way to manually switch from speakers to headphones? Can I tell the computer when I want it to play through the speaker and when to play through the jack? I have gone in to apple and they told me the way to fix the problem is to replace the logic board because the headphone jack is connected to it, but I dont have that kind of spare money laying around. Thank you in advance for your help!