Hi - this is just my second post. I'm a new Surface Pro 3 owner, but have been using Microsoft operating systems since MS DOS days. (yeah, I'm older than dirt!) I just noticed that when I plug in my headphones, the speakers don't mute. (I don't use them very often) Searched around and found a "fix" by selecting headphones as the default. Worked fine. However, when I unplugged the headphones, the speakers didn't work. Tried to reset the internal speaker as default, but still wouldn't work. Rebooted the system, and the speakers are now working. Is this how it's supposed to work, or do I have a faulty headphone/mic jack? Really don't want to send this back to the factory, but for what I paid, I expect everything to work! Thanks for any assistance.