Thank you for posting on the Intel® communities and for your patience in this matter.
After checking further regarding your inquiry, we would like to inform you that the Power On Sequence information for the Intel® NUC Board NUC7i3BNB is not available.
In this case, our recommendation is to reach out to Intel® Customer Support through phone or chat and review warranty availability for your Intel® NUC. Here is the "Contact us link": https://www.intel.com/content/www/us/en/support/contact-support.html#@7
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