Just to add more details, I've tried removing all RAM (in fact, I removed everything from the board the I could, including disconnecting the CMOS battery) and replaced them one-by-one with no change to the outcome. I also attempted to remove the BIOS recover jumper, but no dice. Nothing else has changed from the working -> not working state other than the BIOS version - same cabling, same TV, etc.
There is obviously some kind of connection going on as, my TV won't even let me select (in my case) HDMI2 without the NUC connected. As soon as I connect it, HDMI2 becomes an option, but when I select it, it warns that no signal is being received.
Try running BIOS recovery File name: WY0037.BIO
See instructions here: Intel® NUC Boards and Kits — BIOS Recovery Update Instructions
If you still have same problem, my recommendation would be contacting Intel Customer Support for warranty replacement of your NUC. You can use our Web Ticketing system to do that.
Online warranty: Service Request Email
Chat support: http://www.intel.com/p/en_US/support/contactsupport
Thanks. I created a service account during which the Agent also got me to attempt the Recovery BIOS, but with no luck - still 'No Signal' received by monitor.
An RMA has been created and I'm just waiting on local Intel Support contacting me with shipping details etc. Hopefully that will be today.
Thanks for the reply.