I downloaded the latest drivers and BIOS from intel and attempted to update them.
After the BIOS was updated it went to a black screen. I could not see anything on the display. I purchased all different adapter types and I have even tried the recovery options specified in other posts.
All suggest pressing keys when prompted but I do not see anything. I did hear the 3 beeps but the last time I tried to hear the 3 beeps it did not have any sound. Still no video at all.
Try disconnecting power and then unplug battery from NUC's board for 15 minutes (battery is connected to processor side of board). If this gets you going again, enter BIOS Setup, set the date and time and then reset the BIOS configuration to defaults.