Hey, I have a MacBook Pro (15'', Intel Core duo 2.4 GHz, 2GB ram) that I´ve bought in June. Yesterday I upgraded my mac to Leopard and, since then, the built-in speakers haven´t worked. The sound preferences say: "the selected device has no output controls". Headphones work pretty well, though. Well... I've tried resetting PRAM and SMC, but it did'nt work. I´ve also tried reinstalling Leopard and updating it to 10.5.1. But it didn´t work either. So, today I´ve just used the option "erase and install" and reinstalled Leopard, erasing everything from my mac. Well... it didn´t work, and I still can´t make my built-in speakers work. Does anyone have any idea about what should I do?