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Installed new pc parts, pc wont boot

Dec 17, 2018 9:08AM PST

Hi! Just installed New motherboard, graphic card, and ram sticks.

Asus prime B350M-A
Ryzen 7 2700
Radeon RX 580
Corshair Vengance LPX ddr4 3000mhz

Now my pc starts and graphic card and motherboard lights up, but my monitor, keyboard and Mouse is dead.
Have tried both ram sticks alone but its the same.

I Have an Corshair hx 850 power supply.

Anyone Have any ideas?

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