Update = After completing troubleshooting, a DELL-Cares agent setup a part replacement.
I made the mistake of buying a Dell XPS 8940 which failed after 29 days.  I spent $2,500 on this system only to have the motherboard fail.  Tech Support said they would send someone else to replace the motherboard with a refurbished part.  I said I did not want the computer pulled apart and then have a refurbished part and that since I was within the 30 day period I wanted to cancel the purchase. A supervisor got on the line and told me if I did not cancel the order I would have a new system within 5 business days.  I unfortunately agreed to that as I thought that was a reasonable offer.  That was over 3 weeks ago and 16 different interactions with Dell.  No one can tell me where the replacement computer is and each time I am told I will have it within 48 hours.  My last interaction I was told to call Customer Care to cancel and get a refund.  They told me that I could not cancel as the 30 days was up and no Supervisor was available to speak with me. So, here I am no computer to work, no idea when I can get a replacement and one dead Dell computer.  I cannot even post a review on the XPS product page to warn people not to buy this garbage. Service Request Number   I am filing a complaint with the BBB now too.
XPS 8940, dead motherboard, awaiting replacement for 3 weeks