Did not post - Dell is replacing it with a XPS 17 9720.  I was advised to contact Dell if I need to make any bios changes.  I've been working on and building computers since 1994, and did not get a straight answer from Dell support about making a bios change to change the UEFI stack.  
I have a new XPS 17 9710 that was taking forever to boot.  I'm not booting from a network, so I made a change to disable the UEFI Network Stack so the computer would boot faster.  After that change, the computer would not boot.  Called Dell - after some troubleshooting, the computer delivered an error code via the charging indicator - 2 amber - 8 white flashes, indicating an LCD rail failure.   Dell wants to either replace the motherboard, or the entire machine.  How is it that making a simple bios change renders this machine inoperable?  
XPS 17 9710 no boot after bios change