My AC Adapter died this morning on my SP3 purchased on 10/15/14. It worked fine the day previous. I used it throughout the day yesterday and last evening. When I went to plug it in this morning I noticed that the LED on the AC Adapter wasn't coming on. No indication on the SP3 itself, no battery light, no charging indication but the tablet was functioning normal otherwise. I did some research and tried all the tricks I could find online. I changed the AC Adapter orientation, changed electrical outlets, restarted the device, shut down the device, two finger shutdown of the device, uninstalled the battery drivers in device manager all to no avail. I then attempted to plug my phone and tablet in to the USB power port on the power brick and noted that it wouldn't offer power to any device that I plugged in. I ran over to Staples and purchased a new AC Adapter and all is now right with the world. I'm going to attempt to contact Microsoft and see if I can get a replacement charger. Do you think I'm best trying this on line or visiting a Microsoft store in person? I was planning to get a spare adapter for travel anyway so this just pushed up my timetable but I would like to get a warranty replacement for the one that died so prematurely. Just curious if anyone else has had their adapter die on them.