I have a D54250WYK. Entering the BIOS everything works fine for a few minutes. Once I navigate to CPU, memory or other performance settings, simply accessing some drop-down lists causes the BIOS to freeze. The BIOS clock and diagnostics continue to run; however, it no longer responds to keyboard presses, except for Ctrl+Alt+Del, which does restart. I can reproduce the behavior every time.
I have tried using different RAM modules. I even returned the NUC for a new one. Same behavior. The RAM is a 2x4GB 1.35V DDR3 PC3-12800 SODIMM kit. I tried upgrading the BIOS to the latest version, and it also has the same problem.