Question PSU give a tiny burst off power then turns off and repeats

[cubegaming]

This is a prebuilt system and was not tinkered with before this problem, I narrowed the issue down to the PSU, MoBo, CPU or RAM, but I doubt that its the CPU or RAM

 

[USAFRet]

Did it ever work?

 

[cubegaming]

Yes it worked before, then I stopped using it for about 2 months and now its not working. Also it was completely unplugged during the time it was not in use