Got a fresh NUC PJYH3. Came with BIOS 027.
First problem: The BIOS does not save any changes. After F10 and ok screen freezes and after a few seconds system reboots with old settings.
Second problem: downloaded JY0047.bio and tried to update with the F7 key press method from USB stick. Black screen forever. Reboots to old BIOS. Then I went into the BIOS screen and tried to update from there with F7 and file navigation. Get immediately this message:
Internal Error. Error updating capsule.
Also, Boot Display Config has by default ticks for Display F2, F7,F10 but none of them is actually shown. The splash screen just reads "Intel NUC".
I have set up a few NUCs before and went through certain issues but this one seems badly borked.
Did fresh FAT32 formatting on another stick and put bio file there. Same issue. Also tried to upgrade by just one version to 0037. Exactly the same problem.
I have a Gemini Lake Pentium. I ordered NUC7PJYH and on the label it says NUC7PJYH3 (a digit 3 at the end). When I try the Power Boot Menu then screen remains black. But I can press F2 during normal boot to enter BIOS. As I wrote above, F10 Save and Exit does not save modified BIOS settings but freezes the screen. So when i disable Secure Boot, then F10 Save and Exit the machine stays frozen for a while, then reboots and I have the old settings with Secure Boot enabled. F7 BIOS update ends again with Error updating capsule.
Please open the NUC bottom case and verify that the yellow Bios Security Jumper is installed between pins 1-2 (normal position) and not between pins 2-3 (Lockdown position). See paragraph 2.3. page 48 of Technical Product Specification https://www.intel.com/content/dam/support/us/en/documents/mini-pcs/nuc-kits/NUC7xJY_TechProdSpec.pdf
I believe that your flash component is bad. You will need to get this NUC replaced. If you can exchange through storefront you purchased it through, do so. Otherwise contact Intel Customer Support (ICS) directly (i.e. via phone, email, chat or forms service) and arrange replacement via the RMA process. Either way, remember to remove any memory or storage you added to this unit.
Hope this helps,
P.S. Leon and I are volunteers, not ICS.