My nuc just lost power while browsing. Now when i connect the power cable i just hear electric "humming" noise from it and it will not power on.
What is "it", the PSU or the NUC?
Regardless, I would be trying a different power supply; it sounds like yours has failed. You need one that is 19V 3.42A (65W). You can purchase them pretty cheaply ($13) through Amazon. If you do not want to do this, you can contact Intel Customer Support directly and make arrangement to replace the unit (and PSU) via the RMS process. Here is contact information, by geography:
http://www.intel.com/content/www/us/en/support/contact-support.html# @11 Intel Customer Support Contact Information for US and Canada
http://www.intel.com/content/www/us/en/support/contact-support/emea-contact.html Intel Customer Support Contact Information for Europe, Middle East and Africa
http://www.intel.com/content/www/us/en/support/contact-support/apac-contact.html Intel Customer Support Contact Information for Asia-Pacific
http://www.intel.la/content/www/xl/es/support/contact-support/lar-contact.html Intel Customer Support Contact Information for Latin America
You could also try using the chat service (here: http://intelsupportchat.force.com/icslivechat/ics_tech_desktop_ww_english_Chat Intel Customer Support Chat Service), but this is English-only and subject to PST TZ hours.
Hope this helps,
I just shipped it back to the shop, no time to troubleshoot myself with all the closed days coming up.
If getting a new i3 would the win 10 license still work on the ssd? If its not fixable either getting a new i3 or i5 depending on stock.l
Provided you didn't get to Windows 10 via upgrade and provided that you have logged into a Microsoft account at least once from this box, then the digital entitlement will be in place and you should be able to transfer it to the new hardware.
This model comes with an Optane Memory module installed in the M.2 socket. If the shop doesn't remove it (since your original 3BN NUC didn't have one), you can use it to accelerate the performance of a HDD -- but this is at the expense of not being able to use a (M.2-based) SSD (a significant loss, IMHO). If you already have a M.2 SSD, just remove the Optane module and install your SSD in its place (and disable the Optane-related settings in the BIOS, if they didn't do this for you).
Hope this helps,