Ok so i when i try to plug in my psu connector to my motherboard it turns on all the fan for 1 second and then turns off.
I tried switching the motherboard battery and the cpu but nothing work. I also tried using a paper clip to turn on my psu and it turns on. Thanks
If everything is installed correctly, like standoffs for the motherboard all cables hooked up (24pin and 4(8)pin) and you tried with a single stick of ram it is a toss up between the board and PSU. There is a link in the guide how to do bread boarding and that would be the next step.
If there are no beeps without ram or GPU and speaker is installed then it is the most likely the motherboard but if it is still only turning on for 1sec with min components then it still can be the PSU.