I have bought
Intel NUC Boxnu X6CAYH Celeron J3455 Max. 8GB RAM 2GB DIMMS including Intel Wireless-AC 3168 + BT 4.2
together with one memory module
QUMOX 4 GB 204 pin DDR3L-1600 SO-DIMM (1600Mhz, PC3L-12800S, CL11, 1.35V, Low Voltage)
Kingston SSD A400 – Solid state drive 2.5 inch SATA 3 Solid State Drive, black.
Assembled together, connected mouse, keyboard and monitor through HDMI.
Power switch turn yellow color. When switched on, it turns solid blue, no blinking.
Keyboard is not reacting, no led diodes on, nor blinking.
Mouse is not reacting, no red light from optical mouse.
Monitor stays black. No signal from HDMI, tried two monitors.
Tried also another 4GB memory module with the same specs. Nothing happened.
Then returned the NUC unit and ordered a new one. Problem remains even with the new one. I don't know if I had two defective units?
It should not be memory problem since then the power button shall be blinking, see Troubleshooting No Boot or No Power Issues on Intel® NUC Products
When trying clear CMOS, see Clearing CMOS on Intel® NUC nothing happen.
When holding power button for 3 seconds, see BIOS Recovery Update Instructions for Intel® NUC , nothing happen.
Still no monitor signal, no keyboard diodes, no optical mouse light.
But I can charge my mobile phone through the USB ports!
I am suspicious if the units was not tested on Windows system and fastboot option were enabled. Now without any OS I can not boot.
Fast Boot enabled
Fast Boot is a feature in BIOS that reduces computer boot time. If it's enabled, you cannot press F2 to enter BIOS Setup, since USB mice and keyboards are unavailable until after the operating system loads.
But I would like install Linux to that unit. I have read how to disable fast boot according to Using Fast Boot in Intel® Visual BIOS 2.x and Using Fast Boot in Intel® Visual BIOS 1.x But both assume that keyboard is reacting and that something appears on the monitor, which is not the case.
Thank you for any suggestions,