Two Dead AW 18's

 I have two dead alienware 18 laptops.  One has no power.  I've tried all sorts of tricks.  The power button doesn't even light up when the power adapter is plugged in.  The other machine has the dreaded 7 beeps of doom upon startup.  The power button lights up, but that's it.  Both have no signs of life.  I've tried battery removal, swapping, and drains with other machines with no luck. I've removed and reseated memory and tested with various amounts and locations.  

They have less than 10 hours of use and have lived in a metal laptop cabinet since being unboxed.  Another machine was repaired under warranty after the hard drive plug became loose.  Three of my fourteen machines have needed repair.  Two are already dead in under two years.  Thanks for your time.