Just plug it in and go! I mean, if it had been sitting in a store and you bought it in the same box, same sealed packaging, would you service it? I wouldn't. (I'm assuming that by "sealed" we mean new, never opened? Not opened, used, sealed shut with tape for 7 years, right?) I would check the cord first, as with any machine, to make sure there are no frayed wires (can't imagine why there would be, but better safe than sorry). Enjoy!