Question Ez Debug Cpu Led flashes white once on CPU then shuts off the pc

[Nyubii]

I just built my new pc and tried to turn it on. The motherboard flashes the ez debug cpu led for a brief moment then turns the the pc off. The case, video card and cpu cooler fans all won't spin when powered on. What could be the problem?

My Computer Components:
Processor : AMD Ryzen 5 2600 Hexacore (6Cores)
Mainboard: MSI B450M Pro-VDH Max
Graphic card: Nvidia GTX 1660 Ti
RAM: G.Skill Aegis 3000Mhz
SSD: Intenso High Performance interne SSD 480 GB
HDD: 1TB Toshiba Performance
power adapter : Be quiet Pure Power 11 400W
Case: Sharkoon V1000

 

[Mtop]

Nyubii,
Well for starters your graphics card recommended power is 450 watts 50 more than you have.
First you need to see why fans dont spin - remove your graphics card and use the graphics on the motherboard. Since it wont turn on you may want to remove extra HD drive too.
Get it to post then add things back.
Hope this gets you started.