I'm going a little bit nuts. I'm sure the answer is something simple that I've missed, but I just don't know what it is. My computer: 2010 MBP, 17". I purchased it new a few months ago. My problem: The sound volume is crazy low. All was fine until a couple of days ago... And then for whatever reason the speaker volume, even at max settings, was about 10% of what it had been. When I put headphones in the volume is completely normal (through the headphones) and adjustable. But when I unplug the headphones from the jack... Virtually nothing. When I restart my computer, ya know the chime it makes when it wakes up? For split second that chime will be at the normal volume. But before the chime finishes playing, the volume turns all the way down by itself. In the time it takes for the chime to play my volume goes from about 90% to 10%. It gets weirder still. When I plug in external speakers the volume is loud for about... well it's less than a minute. And then something "adjusts" and no matter how high I crank the knob on the external speakers the resulting volume is still pretty dang low. And that's with the powerful speakers... The little portable red ones barely make a peep. Adjusting things with iTunes makes no difference whatever. OH! Unless I am playing a podcast. My volume on podcasts is still normal, regardless of whether I'm using my laptop's speakers, my iHome portable speakers, or my earphones, or my other computer speakers. Confused? Yeah me too. I googled around a bit... I can't find a solution for this because I can't find anyone with a problem quite like this. And there isn't a little red light on inside the headphone jack input thingy. If anyone out there can help me... please... I would be so grateful. This is driving me crazy.