Computer starts then shuts off and restarts after 20 Seconds
Im 16 and my family's computer starts then after 17 - 20 seconds it shuts off and restarts to do the same thing all over again. The moniter doesn't even light up nor the mouse's light. Please i need your help! Im desperate. It did this before so i got it to a friend who could fix it but when he turned it on in his place everything seemed fine. It turned on and it didnt restart and stuff. But then when i took it to my house and turned it on but it still kept on restarting then i tried plugging it in another socket thinking it was the power supply the for some reason after a lot of trys it worked finally. Then after month it kept restarting again then i couldn't turn it on even when i plugged it in another socket. I'd really be happy if you guys could help.