Question Motherboard not posting after removing CPU

Apr 18, 2021
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I have an Asus rog Strix 399x gaming motherboard with threadripper 1920 CPU. I built this by myself a few months back and everything was working fine but yesterday out of nowhere a 0D error appeared. I tried changing RAM sticks and with only 1 RAM but the error was still there.
After I remvoed the CPU the PC didn't post which I rember posts without CPU when I was building this system. So do you think is this an issue with the mobo or something else?
P.S : I have already tried clearing CMOS and Bios flashback.
 

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