I searched mroogle for a while and only found one similar thread but there was no answer. I hear a "pop" coming from the front of my mac pro case probably 3-4 times a day. It is random and happens whether I have my external speakers on or off. It sounds exactly like it is coming from the crappy internal speaker that the Mac Pro comes with. Anyone having similar issues or know what is going on? Leopard is up-to-date. My second question, which may help narrow down the issue, is how do I disconnect the internal speaker in the Mac Pro? There must be a cord or something inside I can pull to disable the speaker entirely. I don't use it and if it's causing the popping sound, I might as well unplug it.