msi mpg b550 gaming carbon

So my pc was on and i didn't do anything and all of a sudden my pc turns off. it starts but my monitor says no signal and my keyboard won't light up. also other usb things won't work. i have checked that all the cables are on the right places. motherboard's ez debug light is on vga and the light...

I am about to upgrade and I already have a Ryzen 9 3900X. I've been scouring online recommendations, and whittled the list down to 3 motherboards that seem to get high praises: ASRock B550 EXTREME4 ASUS ROG Strix B550-F Gaming MSI MPG B550 GAMING CARBON I currently have a MSI GAMING B450...