I have a 13-inch Macbook white unibody and for some reason it suddenly will shut down when I move it. The powercord will not light up or charge and I have to reconnect it 20 or 30 times to get it to charge again. I've reset the SMC and it still happens. Is this a known problem or has anyone had it before? The computer has not been dropped or damaged at all and is just a year old. Any type of movement will shut it down and make the power cord stop charging and it is hard to start the computer back up as well.