I have a 2016 Dell XPS 13 9350 Signature Edition laptop purchased about a month ago.
I have recently had a variety of issues, all happening intermittently. There does not seem to be any real pattern to these issues. I am considering returning the laptop, given the frequency of problems. These issues include:
In the past, I was getting issues with sleep, but I have not seen these issues come up in a week since I updated all my drivers.
Here's my specs:
You can only return a system for replacement within the first 21 days after shipment (if you purchased from Dell; your reseller may have different policies if you purchased elsewhere), but the mainboard needs to be replaced - if you don't have return privileges with your reseller, contact Dell support to initiate a warranty replacement of the mainboard.
Based on the description of the diagnostic leds, and as advised by ejn63, I also suspect a failing motherboard.
If you choose to get a service call under warranty then, please click my DELL-username and write me a private conversation with the service tag and your contact details(Name, Phone#, Address and Email).
Let us know if you have any other queries.