Hi,I'm a newbie here and I've got just received my Apollo and I'm really thrilled to make it work

.
I did everything with the SD Card and it seems to have been burned right.
I have an issue and I'm not able to power up my Apollo : I'm using a brand new Egva G3. I plugged a VGA cable in VGA 1 in the EVGA and put the end of the 6+2 cable into one of the power inlet in the Apollo (I'm using only the 6 part cable, the +2 is floating in the air next to it). But it doesn't power up.
What did I do wrong ?
Thank you for your answers !! Dave