Troubleshooting PSU

logonet · 29 Jan 2019 at 13:04

I am trying to find out why my pc won't start anymore after just changing my Front panel fans.

When i try turning on the pc everything lights up for about 0.1 sec then pc turns off.

so far I have unplugged GPU, hard drives, fans except cpu cooler ones.
I have taken out all ram except one in right dimm slot.

I put my cpu out and in again as well.

I have cleaned out all dust everywhere, except i haven't tried taking out my mobo out yet.

there should be nothing wrong as pc worked fine before changing the fans in the front of the pc.

My question is what does the pc have to have in order to turn on for more than 0.1 sec? so i can try troubleshoot this issue.

pastymuncher · 29 Jan 2019 at 13:54

Hi and welcome to the forums.

Is it possible that you knocked one of the power leads a bit loose when fitting the new fans? Try removing and then refitting the 24 pin, 8 pin and pci-e power plugs. What is your system spec including make and model of psu?

logonet · 29 Jan 2019 at 14:18

Hi!

PSU: HX750i, CPU: I7 6950X, Mobo: Asus 99X-E Mobo

Will check on cables now, but I already did replug them in

logonet · 29 Jan 2019 at 14:22

Still the moment i press the power button it turns off instantly

EsaT · 29 Jan 2019 at 16:13

Have you tried jumpstarting PSU separately?
https://www.silverstonetek.com/downloads/QA/PSU/PSU-Paper Clip-EN.pdf
Though with semi-passive fan you would need multimeter to check voltages.
(or fan with Molex adapter)

logonet · 29 Jan 2019 at 17:42

that may be something i wouldn't try to attempt, but I can hear 1 tick noise as the psu turns off everytime, does that mean anything?

logonet · 5 Feb 2019 at 14:42

EsaT said:
Have you tried jumpstarting PSU separately?
https://www.silverstonetek.com/downloads/QA/PSU/PSU-Paper Clip-EN.pdf
Though with semi-passive fan you would need multimeter to check voltages.
(or fan with Molex adapter)

I purchased new psu, still exactly same issue.

only 2 rams are inserted, cpu coolers are connected cpu power and mobo power plugged in.

bledd · 5 Feb 2019 at 15:52

What I would do is take the motherboard out of the case and place it on the motherboard box and try it out of the case.

In case there a short somewhere.