PC shuts off if you barely touch any of the back power wires

[PacmanGamez]

The title says it all. Almost. So if you bump any of the back cables, ANY at all, like literally barely tap them, the computer just shuts off. Monitor goes black, fans turn off. Not sure if this is the right section or not. But a second ago i just barely nudged my monitor to the right and the computer shut off. I am really getting aggrivated by this. Also, after it shuts off, a few seconds after it shuts off, (Jeez.. thats a bad sentance.) It makes a sort of ''8-bit'' explosion noise into my headphones/speakers. Atleast thats what i would call it. So if anyone knows the problem, I would be very happy.

 

[GunFinX]

Turn off the power at the wall.

Untangle any cable tangled up with the pc power cable(the cable that is plugged into the pc power supply), after that check that the cable is surely plugged into the pc powersupply.

If the pc powersupply cable is too short or seems like it is stretching to reach the pc perhaps buy a replacement.