B450 Tomahawk boot led error

Dec 13, 2018
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This is my first time using this website the situation is that I just upgraded my PC from an intel i7 to a new amd ryzen 7 2700 cpu, b450 tomahawk motherboard and 2 new sticks of generic 8gb ram. I have the same hard drive from my old set up because it has all my data. My issue is that when i boot it displays the VGA led then stops and displays the BOOT led followed by the computer shutting off when i attempt to start it. Nothing is displayed on the screen but it sedms that all the hardware starts operating. Any help on how i can boot my pc properly?? Thanks