Hey, I have a 2009 macbook with version 10.6.4, 2.13 GHz intel core 2 duo processor and a 2 GB MHz DDR2 SDRAM memory. Last week I was using to play music through an auditorium sound system and it sounded strange. The next day I had lost sound through the right side of my head phone jack. The left side is good along with the speaker. Any ideas on how to fix it?