My Alienware won't start

Hey so I got a new Alienware 18 base model in march 2013 it's February now and I have had very little problems but my computer now won't start. It started a couple a days ago when the LED display stopped working and I restarted my computer but nothing happened I blew it off because it just didn't really care about the flashy lights so I decided to shut down my computer from windows because the power button refused to work and that should have been the first warning  that I should have not shut of my computer. So now I'm locked out when I push the power button literally nothing happens nothing it's like it's been bricked. I tried unplugging the power cord from the wall and holding the power button for thirty seconds and i tried 5 min later still nothing please help this has happened before but I fixed by unplugging the power cord but it didn't work this time