This message was posted on behalf of Intel Corporation
DubravkoV: Thank you very much for joining the Intel® NUC communities. We are sorry to hear the NUC is not working as expected.
At this point pretty much you tried all the steps we recommend in order to try to fix this problem. You mentioned the NUC went off by itself, that could be related to a power outage or it could be also related to the memory RAM. The proper memory for this unit is: DDR4-2133 1.2V SO-DIMM, please make sure the the one installed on the NUC complies with those specifications:
Another step to do if you have the option will be to test it with a different memory stick and with a different power supply on different outlets, just to rule out a possible issue with those parts.
Besides that we can try a BIOS recovery to the latest version 0051:
If the problem persists after trying the steps above then a replacement of the NUC will be the next thing to try. You can either check with the place of purchase to confirm if they can do that for you or you can also get in contact directly with Intel for the replacement:
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 questions, please let me know.
Thank you for taking your time to reply, Alberto. And, believe you me, I too am sorry it's not working as expected.
I use correct, Intel-tested RAM and I don't have any spares so I cannot really test whether it's the RAM. Prior to the issue, though, BIOS recognized the RAM just fine. Also, I did try removing it but the problem persists—whenever it's plugged in, unit's power button rapidly blinks orange and is unresponsive which is also the reason i can't really perform any BIOS recoveries.
Apart from the power supply computer came with, i don't have any so I can't really test whether it's PS-related but I did try multiple outlets and had the same outcome.
Anyways, I'll be sending it back, so... Thanks!