PC Powers on, then off, then comes on normally

muldy29 · 06 Jun 2016

Ok, for a week now, my PC will power on when I press the button, boot normally for a few seconds, then it just loses all power.
If I press the power button again, it boots perfectly fine.
I thought it could be the switch on the case, so have bought a new case and installed it, making sure all the connections are tight. For a while (2 turn ons) it was fine and I thought it was fixed, today I have gone to turn it on and it has done the same.
Is my PSU dying?
or could it be something else?

Mellon Head · 06 Jun 2016

I think that it might likely be your PSU. DO you have another that you could use to test the theory? Even one from a friend temporarily. It's better than buying a new supply and finding out that isn't the issue. But from what you're describing, it sounds like a PSU issue.

muldy29 · 07 Jun 2016

could this also describe why my monitor flickers every so often when using split screen view or just watching Youtube in general, but in games at full screen, it runs fine?

muldy29 · 08 Jun 2016

It's not the PSU, nor is it the power lead, as i am now using the new one that came with the PSU in a different plug socket, so its not that, Think I am going to have to live with it

GEWB · 09 Jun 2016

Go into the BIOS setup.
Under Power Management set the Power Loading to ENABLED.
Save & Exit the BIOS setup.

Let us know what happens.

Regards,
GEWB

muldy29 · 09 Jun 2016

for the moment, it seems to have fixed it, will check again later and tomorrow, but hopefully

Layback Bear · 09 Jun 2016

Exactly what power supply are you using.
Post a site if possible.

muldy29 · 09 Jun 2016

https://www.overclockers.co.uk/super...ca-011-sf.html
This is the PSU I am using now
the previous one is a HIPER Type M HPU-4M630 630W Continuous @ 40°C (Maximum Continuous Peak: 870W) ATX12V V2.2 & EPS12V V2.91 SLI Certified CrossFire Ready Active PFC Power Supply - Newegg.com

Layback Bear · 09 Jun 2016

The reason I asked is because some newer power supplies have a pre-check if the power to the power supply has been removed.

Example:
If you turn the wall outlet power off to the power supply and then turn it back on, the power supply will do a pre-check.
This pre-check will start the power supply and then stop and restart if everything is okay.
If you leave the power (wall socket) to the power supply on it will not do this stop and start thing.

My AX860i will act this way. Your millage may vary.

muldy29 · 10 Jun 2016

It is left on permanently at the wall.
Turning my pc on this morning it did the same thing as before, on, off then powered on.
Just now after work, it came straight on, so will keep an eye for a day or 2