Well, from what you have said, it appears that you have a PSU or mobo problem. Personally, when that shyt happens, I part shyt out and buy new shyt.You know if its possible to hook my PSU directly to my MOBO so I can bypass the case all together? I'd like to avoid having to rush and buy a case but this shyt just cut off again
But, what PSU do you have? You might be able to RMA that shyt too