Question New PC built won't boot

May 11, 2019
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I have recently made this built:
Intel Core i5-9600k 3.7 GHz
Asus ROG Strix Z390-e
Be Quiet BK008
MSI NVIDIA GTX1660Ti Gaming X 6G
G.SKILL F4-3200C16D-16GTZR Trident Z RGB Series 16 GB (8 GB x 2) DDR4 3200 MHz PC4-25600 CL16
Corsair RM850x 80 PLUS Gold, 850 Watts
NZXT H500

When i turn on the PC, the motherboard lights up, the graphics card lights up, and the RAM lights up. But it isn't booting. My monitor isn't getting a signal, and my keyboard doesn't light up, when i plug it in. The four LEDs on the motherboard, which would show if there were any problems with the components, aren't lighting up, not even temporarily
 

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