I try to start my PC but it turns off then on then off again.

[RealityXS]

So, as I said my computer boots on and nothing happens, and then it dies, and it tries to start again, but fails. Multiple times. It happend after I accidently hit the top of the computer with my elbow. My headset started making random scary loud sounds and my screens froze. I have barely no idea what it can be so please be nice :3 Please help rather quick!

 

[Ranger29]

This happened to me before, what I did to fix it was to unplug then plug the cables again, I also did that to my RAM. Try these things and see if it can fix your problem, good luck.