Hi spoony: Thank you very much for joining the Intel® NUC communities.
In this case we can try to re-install the chipset and management engine drivers:
If the problem persists after that, then the next thing to do will be to replace the NUC. Remember it has 3 years of warranty with Intel, please get in contact with Intel directly in order to do that:
Chat support: http://intelsupportchat.force.com/icslivechat/ics_tech_processor_ww_english_Chat,
For phone support, depending on your location, you will see the contact information on the links below:
EMEA contact information: http://intel.ly/28QeAF3
APAC contact information: http://intel.ly/1ITfjUF
LAR contact information: http://intel.ly/29c0rW4
North America: Phone Number 1-916-377-7000, Monday - Friday 7:00 AM to 5:00 PM (Pacific Time).
Any further questions, please let me know.