New PSU, nothing getting power?

capsam500 · Jan 13, 2016

Just bought a new PSU (corsair cx750m) to replace my one that stopped working.

Connected everything up and for some reason the motherboard doesn't seem to be getting power as usually when the power is turned on the USB devices connected to the motherboard light up and they haven't. I also cannot boot the pc as the power button does not work and so the whole machine for some reason is not getting power. I have no doubt that the PSU is getting power as it is brand new but i just cant figure out why i cant boot it.

Any help much appreciated.
Thanks

turkey3_scratch · Jan 13, 2016

Is the switch in the back on?

capsam500 · Jan 13, 2016

turkey3_scratch :

yes, this was the first thing i checked lol, i can hear a slight clicking sound which seems to be the sound of the power going into the PSU but no further so there is definitely power getting to the PSU

turkey3_scratch · Jan 13, 2016

A clicking noise is usually not good. I'd return the PSU. And TBH, I'd get your money back and buy a different one. CX 750 is low quality, and I doubt you want to be replacing this in a year.

capsam500 · Jan 13, 2016

turkey3_scratch :

not exactly what i wanted to hear as ive just bought this and so it should work should it not? regardless of how good the quality is. Is this the only thing you think it could be. I'd be pretty unlucky if they sent a faulty one

babernet_1 · Jan 13, 2016

Yes, why did you buy a CX series Corsair? It seems so many people buy them when they are really a lot of trouble.

Serious question.

turkey3_scratch · Jan 13, 2016

It could just be dead on arrival. Assuming you made no mistakes at all in putting together the build, or should I say plugging in the cables, it should be working, and if it makes that clicking noise when you press the power button but does nothing, it's dead on arrival.

JasonL265 · Jan 13, 2016

First check to make sure the power button is turned on and that the power cable is plugged into the outlet.

Make sure that the CPU 4pin / 8 pin connector is plugged in and that giant 24 pin connector is also plugged in.

There is also that chance that you got a dead PSU, its not uncommon for people to get dead parts even if they are new. Just this weekend when I built a new budget PC for my brother, i got a dead MOBO and had to get it exchanged. After that it was working just fine.

turkey3_scratch · Jan 13, 2016

Yes just to make sure | means on and O means off. Which I never understood because in terms of electricity, you need a completely circle for electric charges to move because they simple revolve around, the false impression is that they are shot like a gun across a straight | path.

capsam500 · Jan 13, 2016

babernet_1 :

because some of us are on a budget and this had good reviews

turkey3_scratch · Jan 13, 2016

What are the rest of your system specs? Particularly CPU and GPU?

capsam500 · Jan 13, 2016

JasonL265 :

ok thanks for the advice, i'll look at replacing it

capsam500 · Jan 13, 2016

turkey3_scratch :

AMD-FX8350
EVGA GTX 770 2GB

JasonL265 · Jan 13, 2016

babernet_1 :

The CX series isn't as bad as most people think it is, just not the best. Most people get it cause its normally cheap with rebates /discounts and its from Corsair, I have built 2 budget computers with it before for my family and they are still working (about 1 and 2 years old).

But of course most people who post threads about them will have issues with them, no one is going to make a thread saying that they bought a CX--- PSU from Corsair and that it works for no reason

capsam500 · Jan 13, 2016

well Thanks for all your guys help, im in contact with Corsair now and hopefully they should be able to resolve this for me as it looks like im going to need a replacement

Thanks again

babernet_1 · Jan 13, 2016

capsam500 :

Yes, after posting this I took a quick look and those CX supplies are pretty low in price. I would recommend a better supply maybe with your next build. The power supply is very important and when going bad they can actually destroy the motherboard and/or video card.

capsam500 · Jan 13, 2016

Spoken to Corsair and they advised me to do a 'paper clip' test which tests the PSU without the need for it to be connected to the motherboard. Did this and it turns out the PSU is actually working as it made one of my case fans spin. I am now looking into the fact that it may actually be a dead motherboard that i have and that it was the motherboard making the weird noise and not the power supply. Just an FYI in case of of you guys wondered where i was at with it

turkey3_scratch · Jan 13, 2016

Is your power switch cable plugged into the correct spot on the motherboard? I feel like it's not.

capsam500 · Jan 13, 2016

turkey3_scratch :

Just checked that and it looked like it needed moving one space to the left. Did that and i kid you not the whole thing got power for a brief moment as lights came on. However they did not stay on

turkey3_scratch · Jan 13, 2016

Okay, so we can verify the PSU does work. For your next problem, I'd look over this: http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

capsam500 · Jan 13, 2016

turkey3_scratch :

checked through each step and all seems to be in order

capsam500 · Jan 14, 2016

turkey3_scratch :

I fixed it! i basically breadboarded the whole thing and took it apart and put it all back together and now its working and everything is getting power just fine. Thanks so much for all your help.

turkey3_scratch · Jan 14, 2016

Really? That's very strange.

capsam500 · Jan 14, 2016

Yeah I don't know what it was but taking it all apart de dusting it and putting it back together seemed to fix it. Very strange indeed

New PSU, nothing getting power?

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