Weird PC boot issue

[mexashe]

Hello i have this weird PC boot issue. I have secondary pc at home which has been sitting there. i decided to turn it on. It kept turning on, fans spinning everything lighting up, restarting itself few times eventually it would stop and run normally but i kept getting so signal on monitor. i replaced gpu and surprise it turned on. Craziest thing is that when i put old one back in it turned on normally. I reinstalled drivers did 40 min stress test. GPU showed no signs of failing. I kept restarting pc and it would turn on normally. However when i leave pc turned off for some time (around 1 hour) and i try to turn it on. It turns on then turns off for 2-3 times  before eventually starts running and get into this screen ( https://imgur.com/a/sxGoNBT)

It makes me go into bios, i change nothing and it loads into windows normally. Again no GPU, CPU or PSU issue. I stressed them with benchmarks

If i restart or shut down and turn it on immediately it turns on normally. If i let it sit for at least 30 minutes. It starts running then turning itself off few times before eventually loading into this screen which wants me to go into bios.

Please help…

[Blasty Blosty]

Maybe the CMOS battery has died, replace the small little battery on the motherboard if you have a spare, normally a CR2032

 

[Blasty Blosty]

I am not fully confident on this answer, just my best guess

[tilenbox]

I agree. A dead or dying CMOS battery is a good fit for the symptoms and an easy fix. I suspect the "PC turning off and on a few times" is memory training.