Windows 10: My PC were turn on and then turn off instantly Sometime and then also after a long wait not...

Hello, i am first time here..Well before the moment, i were turn on my computer but it wont show the display, The display cable port seem Okay and also the gpu run correctly. My monitor is also working without broken. So after a long wait when the display not showing, i am try again on by Turning it off on the extension. But after turn it on again its worked.. and here it is the momentAfter using a computer on that one day i turning it off, a next day i try to turn it on but Instead not showing a display, it instantly turning it off without any reason. The computer condition is still like yest

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PC instantly turns off


Hey, I'm not too sure where too put this so here is the issue:

Every time I turned my PC on it would stay on for a few seconds then reboot, no BIOS screen or anything showed, I finally got it to work and it said my BIOS was corrupt and it gave me an option to retrieve a backup, which I did and then it started working, it then came up with "Windows can't start up" it gave me recovery options, I tried system restore, no luck, I then completely wiped my PC and reinstalled everything through the recovery, it turned on, everything was fine.

I then turned it off to plug in all of my cables and when I plugged the power cord in, it started the same thing except now it turns on then INSTANTLY boots up again and it continuously loops until I turn it off.

any help would be appreciated.

 

PC refuses to turn on

Ok, wtf is it again...

Came to my PC today and it was turned off. Which is odd since I have it on 24/7. I try to turn it on, nothing. Unplug, plug back, turn on and it clicks, fans spin for a second and instantly turns off.

Cleared CMOS, nothing.

I've unplugged both EATX 8 and 4 pin connectors and PC turns on and all works, system fires up, fans are spinning but mobo doesn't do anything since it doesn't have power. As soon as I plug in 4 or 8 pin EATX plugs, all I get is a click in PSU and instantly turns off.

So, PSU apparently works, what could this mean? Dead CPU or dead mobo? Or something else entirely?

Gonna try TUF diagnostics with my phone now...

TUF Detective goes to "CPU Initial" and stays there the moment PSU clicks.

 

Computer keeps randomly turning off then instantly turning back on

Computer keeps turning off then instantly turning back on im really frustratded now becausw if tryed loads of things to stop it but nothing works heres a list of what i tried,

turning off automatic restart, haviving a look at the fans speed and it was normanl, having alook at the cpu tempriture it was normal, testing the ram it was working fine.

i cant find a soulotion and i would really appricate help