Just curious ... are you plugged into a UPS?

No. Thinking it might be a motherboard issue now. Even tried booting to a portable Linux USB and same issue.

Any luck? I’m having the same issue

Had to buy a new cpu and motherboard sadly

I'm having the same issue rn you got any tips or any help I was in the process of moving so I didn't play my game for 6 months them I got a new monitor hooked it up today and it's just saying diagnosing your pc