I built a PC but doesn't post?

JoDuSe

Commendable
Aug 28, 2016
1
0
1,510
PC SPECS : Asus z170a motherboard
Intel i7 6700k
16 GB RAM
GTX 1060
WD 1TB HDD
750 W PSU

I built this PC and when i press the "on" button it all turns on, the fans, LEDs etc but when i plug in a HDMI to a monitor, it doesn't post. Why? Any help thanks