Microsoft has announced a voluntary replacement program for all Surface Pro power cords that were sold before March 15, 2015, in the U.S. and Canada. It also allies to devices sold before July 15, 2015, in other markets. If the power cord (the part between the power brick and the wall outlet) is wound too tightly, twisted, pinched, smashed there is a potential risk for the AC cord to overheat or burst into flames.
Microsoft has decided to voluntarily offer a free replacement cord. All you need to do is request a replacement from the special Microsoft web page, providing your shipping address and device serial number, and you will get a free replacement immediately shipped to you.
You should discontinue the use of the old power cord, if possible, until a new one arrives. This recall doesn’t impact the power supply that comes with the docking stations, or any device outside the ones listed.