PSU will not turn on... Sometimes

[Stefken89]

Hi all,

 

I am having an issue with my Corsair AX 850 Gold PSU (age almost 8 years - 2012), at least I think it's the PSU that is causing the issue.
 

The computer works fine. But, when I shut it down, the power button on my case and the one I have on the motherboard (MSI z77a-gd80) will not turn on the computer, most of the time. Sometimes it works. 
Most of the time I have to shut down the PSU with the switch on the back for about 10-15sec, turn it back on and then the button will work.

Similarly, when my computer is in sleep mode the power button acts the same way as described above.

 

Any ideas? I'm thinking it's the PSU, but I don't just want to buy a new one if I am not sure it is the issue. 

 

Kind regards,

Stef

[5x5]

Either the power supply or the board. One is on its last legs. I'd suggest trying the power supply first. You have a return window I'd it happens to be the board. Get a Corsair RMx 650W and call it a day

[Spotty]

13 minutes ago, Stefken89 said:

the power button on my case and the one I have on the motherboard (MSI z77a-gd80) will not turn on the computer, most of the time. Sometimes it works. 

...
Similarly, when my computer is in sleep mode the power button acts the same way as described above.

Might be a lose contact on the power switch, either at the motherboard or at the switch itself. Or a loose cable somewhere else... I'd check those first.

[Stefken89]

15 minutes ago, 5x5 said:

Either the power supply or the board. One is on its last legs. I'd suggest trying the power supply first. You have a return window I'd it happens to be the board. Get a Corsair RMx 650W and call it a day

Good idea. It's reproducible since the issue happens pretty much every time I shut down.

10 minutes ago, Spotty said:

Might be a lose contact on the power switch, either at the motherboard or at the switch itself. Or a loose cable somewhere else... I'd check those first.

Well I double (and triple for that matter) checked all the cables, so that shouldn't be it. If it's inside the psu I'm just buying a new one...

Thanks for the opinions!