I had a new macbook pro for a developer job and three weeks after I got it something on the motherboard shorted out and caused one speaker to make a loud popping noise and stop working. it crackled for months before we could get it looked at, and when they realized they needed to replace the whole motherboard the sent it back after certifying that the speakers now worked. Only the broken speaker still sounded noticeably different from the good speaker. I don't have that computer any more, and it still irks me that apple couldn't be bothered to replace all the broken parts.
