Help !!!! (Updated thanks)

[PiggyBank]

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)

Edited August 9, 2016 by PiggyBank
Update

[Carlos1010]

Ok bro so you got 2 options

1. Replace the power button because that might be the problem. You can look on YouTube how to do that and be sure the button fits your case

2. If number 1 doesn't work then every time you power your PC you can power it from the motherboard, that will work all the time. Again you can look on YouTube how to do that. 

[Naeaes]

It's not passing POST (Power-on self-test) Any component that's electrically connected to the computer can cause it to happen. So even USB devices can be the culprit but nothing wireless. Faulty parts or incompatible settings are the most common causes. 

 

Resetting your BIOS and reverting to the factory default settings should fix it if it's caused by bad settings but to root out a faulty part you gotta go digging. Usually best is to start removing parts one by one until the symptom changes. Albeit, given the age, it's likely your motherboard which you cannot remove.

[Rune]

If you have made any component changes or firmware/driver updates, those are probably your culprits. Trying clearing CMOS and jumping it again just to be sure, though.

[Quaker]

8 hours ago, PiggyBank said:

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)

It might not actually be the fault of the PSU, but it would be a good place to start.

 

The problem sounds like there is either too big a surge when the system turns on, or some component isn't starting up correctly.

 

It's possible that the power supply was always border-line and now, because some other component (or the power supply itself) is aging, the startup current surge puts the PSU over the edge.

 

The first thing to do, would be to try a different power supply. But, even if a new/borrowed PSU "fixes" the problem, there may still be a component, such as a hard drive, that has too large a startup surge.

You didn't give any specs for your PSU, but if it's a 5yr old pre-built with a small (watts-wise) rating, that could be your problem.

 

And, of course, clean the dust out of everything and make sure all fans are running normally. This applies to the interior of the PSU as well. (Make sure the PSU is disconnected from the main AC and fully discharged, before opening it up. You can discharge it by pressing the power button after it's disconnected from the AC.)