Intel NUC D54250WYKH2 boot problem

Hello,

I just purchased the following intel NUC kit and got problem to boot it:

- D54250WYKH2

- DDR3 So Dimm Crucial Ballistix Sport 8Go PC12800 1600Mhz CL9 1.35V | BLS8G3N169ES4CEU

- SAMSUNG SSD Serie 840 EVO - 2.5 pouces - 250 Go - SATA III

Indeed, wherever I plug the memory board I got the same result: when I push the On/Off button of the NUC the LED blinks continuously (0.5s on, 2.5s off, ...), there is no display over the HDMI port and I do not hear any fan activity (I don't know if the fan should turns as soon as I start the NUC).

I also noticed that I got the same result if I do not plug the memory on the NUC.

Could someone help me ? Is there any problem with my NUC or with the memory ?

Thanks in advance for your replies.