Question HELP! QUICKLY RYZEN 5 2600 NO BOOT

[sniperlikesgames]

I upgraded my i5 7400 with a ryzen 5 2600 and new motherboard. it turns on, and lights up but nothing on the screen pls help!!

 

[rgd1101]

full system spec? include make and model of the psu

 

[sniperlikesgames]

EVGA 500w bronze psu
RX 580 8GB
RYZEN 5 2600
ASUS STRIX B450 MOTHERBOARD

 

[nick_v15]

Reseat gpu pcie.If you have a second pci-e cable use it.