Dell XPS won't turn on. LED light blinks 4 times white, 2 times yellow

Help,

My new Dell XPS 15 won't turn on.  Last week I had a similar situation, and I had to press the button several times once to get it to turn on with similar behavior.  Now it won't turn on at all.  I can get the LED lights to start blinking, always showing the same pattern - 4 white blinks, 2 amber blinks, and I can get this to turn off by holding the power button down.  Any ideas?  It is only a month old...

David