Question Unable to enter BIOS/memory undetected

[KTMelee]

My PC of 2 yearsall of a sudden had a boot error asking to go into BIOS or choose drive. I was unable use my keyboard, even after restarting and trying every USB port as well as a PS2 adapter (as well as multiple keyboards). I end up resetting the CMOS to see that even though my computer still posts to the prompt to enter BIOS, 0 RAM sticks and 0 USB devices are showing (mo itor/GPU appears to still works). I try reseating the memory in every possible configuration of my 2 sticks (including individually), CMOS resetting every time to no avail. If I try to restart without CMOS reset, I get a repeated error message a second after the MSI BIOS prompt saying "SetVariable ?? : No ResponseInitCbuiVariable : No Response". Is my motherboard bricked since both RAM sticks are not detected, my CPU possibly, my RAM is faulty, or possibly my PSU is bad?

Specs:
CPU: Ryzen 3600
Mobo: MSI B450 Gaming Pro Carbon AC
GPU: MSI Ventus OC GTX 1660 Ti 6GB
PSU: Rosewill Capstone 650M
Drive: M.2 NVME WD SN750 and Crucial P1 500GB
Cooler: Corsair H100X
RAM: G.Skill Ripjaw V 3200 CL14 (2×8GB)

 

[KTMelee]

Picture with BIOS version and video with error code first appearance

https://imgur.com/a/vjGZCM2

View: https://imgur.com/a/vjGZCM2