^^^what he said. you've got a warranty, so you might as well use it.
it's not a simple operation. you have to unscrew about 15-20 screws (some of which require torx screwdrivers), and then pry-off the casing surface with the keyboard on it... then disconnect the keyboard from the motherboard so you can get at the power switch easily... even then, i don't think it will be easy to get at... probably has a switch or wires attached.
if you are an intrepid individual,
here are some instructions that will help you get the case open at least.