I have recently made my first custom pc. When i turn my computer on, all of the fans (case, cpu cooler, and psu fan) and the led on my gigabyte motherboard turn on but after a few seconds all of them will turn off. This makes me think that the computer is on and then turns off but nothing displays on the screen that I plugged in while the computer is on. If i leave the computer after it has turned off it will take a few seconds but it will turn on again only to have the cycle repeat. Can anybody help me? Is it a problem with the mobo, or psu? What should i do about it? Thank you in advance.