power supply dead?

hyip001 · 21 Nov 2011 at 23:30

Just built my new PC and had a problem when I turned on the power, only the fans connected to the fan controller would light up and spin. But there was no post light or beep, also the cpu fan wasn't spinning, nothing was coming up on my monitor either.

I did realize that I connected the 8 pin ATX cable upside down, I don't think this matters though? No pins were bent.
So after unplugging and plugging the AC power cord, I think I heard a crackling noise. Now when I flick the switch on at the psu, I can hear a slight buzzing noise coming from the psu, I don't know if it made this noise before.

So now everytime I attempt to power on the computer, the fan lights will turn on for a second than turn off. Is it safe to say my brand new corsair TX750 has broken?

stulid · 21 Nov 2011 at 23:39

All you can do is RMA the PSU and then hope you didnt kill anything.

BluSky · 21 Nov 2011 at 23:43

A quiet buzzing sound isn't necessarily abnormal, neither is a crackling sound briefly when plugging in a live power cable to the back of a power supply. So don't worry too much on that count.

Do you have any indicators on your motherboard to show that it is getting power, any LED's etc? Also just checking, but you have plugged the ATX power cable back in the right way now... right?

Do you have a power supply tester or know anyone you could borrow one from? If not it might be a sound investment for the future anyway. They are really useful pieces of kit, cheap too, and will tell you instantly if your PSU has any major problems like failed rails etc.

An example is: http://www.overclockers.co.uk/showproduct.php?prodid=CA-145-AN

If the fans are spinning up briefly and then nothing when you press the power button then yes that would imply a lack of power and it could well be that you have a duff supply. Have you double checked all your connections to the motherboard?

hyip001 · 21 Nov 2011 at 23:58

There is an led display on my motherboard (Asrock Z68 Extreme4 Gen3) but even when the psu 'worked' it would not light up or hear any post beep. I have checked the ATX connections so many times i've lost count.

I will look to purchase a psu tester, will save a lot of time and hassle! Guess for now I will RMA it and pray that I did not damage anything else!

Many thanks

stulid · 22 Nov 2011 at 00:01

Google the psu paper clip trick?

fowler002 · 22 Nov 2011 at 00:02

what is the make/model?

stulid · 22 Nov 2011 at 00:03

fowler002 said:
what is the make/model?

Probably a Corsair TX750w, I guess

hyip001 · 22 Nov 2011 at 00:06

stulid said:
Google the psu paper clip trick?

I was just on the corsair support website and just read about this

I may try it out tomorrow, would save a few quid on the psu testers.

Yeah it's a Corsair TX750W V2

fowler002 · 22 Nov 2011 at 00:11

doh sorry didn't read the last bit with the psu model

N$X · 22 Nov 2011 at 00:15

i got myself an antec power tester a few years ago for situations like this. got it cheap for around 12 pounds.

RMA it.

BluSky · 22 Nov 2011 at 00:18

The paperclip trick is an excellent suggestion, and will tell you whether the power supply is outputting in general. However it will not tell you exactly how much voltage is being delivered, nor if you have a failing rail, voltage spikes or drops etc. Depends what you want / need to test really.