on / off/ on / off

Hello, So i can turn my DESKTOP PC on and also normally off. But if i want to restart, (or automatic restarts (ins. windows etc.)), it it turns off and then again on for like 2 s and then off again, and so on... Please help

Hi, I know this has been posted before but those didn't help with my issue... I am concerned that my problem is a hardware incompatibility because I am a PC-builder noob. I built one other PC a few years ago but had someone else pick out the parts. This time, I chose my own parts, I have...