Question Need help monitor suddenly turns OFF and the motherboard has the cpu and dram lights blinking

Nov 2, 2020
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I built my own pc, it was working great until yesterday! The problem is when I ON the system it works fine, and I successfully login into Windows but after a minute the monitor suddenly turns OFF and the motherboard has the cpu and dram lights blinking.
I read a lot if threads and checked as much I could and I couldn't solve it. Please Help

Ryzen 7 2700
Aorus B450 Elite
Corsair CV 450 power supply
Corsair Vengeance 8gb x2
Asus Strix Rx570