PC shuts down instantly at boot

philippeb90

Honorable
Oct 5, 2015
47
0
10,530
Hello dear friends.
I am sorry for any typo's or wrong section maybe. (Using another old laptop im not used to).

So, to sum it up short.
Was gaming on my computer when it suddenly lost all power and rebooted.
After that it will reboot at windows loading screen without any warning (power off completely instant) and reboot into this nice loop.

Here is what i tried, i took out as much unneeded from power supply (Seemd to give 2 sec more time into boot)
Switched ram, dident do any good.

So now i am looking into the following questions:
Will i need new:
Motherboard
PSU
CPU or GPU ?

How can i test each to find out, and do you have any ideas ? suggestions ?

My own theory is that it is the psu that is down since it can load bios (Dosent that mean motherboard is ok ?) and cpu must be running fine since it can load into windows, same for hdd but it seems like as soon as it needs extra power, it dies.

I will be looking forward to your replies.
Thanks