So my computer has been having alot of trouble in starting most of the time just pressing the on button again fixes it, that problem has been occuring for multiple times in the past two years now but only has me troubled today pressing the on button again doesn't fix it anymore, I tried issolating the problem to my button (which is not) by trying to switch power and restart button ( which didn't help at all) so i tried shorting the power pins(another fail) then 1 miracle happened after switching the psu off and on I pressed the on button then the fans started spinning for quarter of a second (really fast) now i dont know the problem, which is where i need the help with.
Help please
P.S my main components except gpu is 5 yrs old ( dont know if this info contributes to anything but here it is)
Edit*
I have managed to isolate the problem to the psu because when i took out the video card it worked perfectly, I suspect that the power output that the psu is lower than it's original capacity ( due to age)