Question Orange light MB, PC wont start

[myownplace]

Hey guys I recently built my new PC however it wont turn on. The motherboard has an orange light on it but when I hit the power button on the computer nothing turns on and the fans don't run.
Here are my specs:
MB: Asus Prime H270- Plus
CPU: Intel core I7 7th gen
GPU: Zotac Geforce GTX 1060
Ram: (2x8) DDR$ RIpjaws V
PSU: Not sure what brand but it's a 650 Watt
HDD: Not sure the brand but it's 1TB

What could be causing it to not turn on?
Thanks in advance!

 

[alexoiu]

Case fans connected to both board and power supply, or risers not correctly installed, or power switch not working, or not connected, or power supply defective, or board defective, or...