Help! My computer just made a loud bang and won't turn on

I am not home at the minute, but will check the caps and try paperclipping the psu when I get back. If it is the psu and I need to return it to ocuk doesn anyone know how much it is going to cost to send it, and if there are cheaper alternatives for a parcel of this size than the royal mail?

Is there any chance I will be able to recover my postage costs from corsair?
 
If you contact corsair direct they may (like some RMA's) pay for your shipping or sent out a courier to collect. But companies that operate like this are few and far between. Id rather pay a few quid to get something replaced under warranty then have to buy a whole new psu or motherboard though ;)
 
Make sure when testing the PSU you have a fan plugging in a molex one.

If you don't have anything to power when you do this, it won't work anyhow.

Also the fan will show its working too.
 
waso_dude said:
Make sure when testing the PSU you have a fan plugging in a molex one.

If you don't have anything to power when you do this, it won't work anyhow.

Also the fan will show its working too.
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Not true, it will run regardless of what is plugged into it.

But I agree, plugging something like a fan into it will help gauge that it is providing power. However a multimeter is a better way of confirming that the correct voltage is being provided, although not everyone has one.
 
waso_dude said:
Make sure when testing the PSU you have a fan plugging in a molex one.

If you don't have anything to power when you do this, it won't work anyhow.

Also the fan will show its working too.
Click to expand...

Sorry if I have misunderstood you - do you mean have a fan plugged into the psu directly? All my fans are powered via the mobo.
 
Speed said:
Not true, it will run regardless of what is plugged into it.

But I agree, plugging something like a fan into it will help gauge that it is providing power. However a multimeter is a better way of confirming that the correct voltage is being provided, although not everyone has one.
Click to expand...

Yup I do not have a multimeter. How much do they cost? I presume I could get one in somewhere like ******.
 
EdwardTeach said:
Sorry if I have misunderstood you - do you mean have a fan plugged into the psu directly? All my fans are powered via the mobo.
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As far as I'm aware, he meant that you have to have something plugged into the PSU for it to start with the ATX short which I explained in an earlier post, which isn't true. It will start if done correctly with nothing plugged in, you'll see the PSUs fan spinning.

However one way to check it is providing power is to plug something like a fan into the PSU direct using the 4 pin molex connectors.

Try the bay for a cheap multimeter, although you might as well just purchase a new PSU, if it solves the problem then just RMA the old one and sell it once you get one back. This will save downtime.
 
Ok guys I have tried the paperclip "technique"! Thanks for the diagram Speed.

Nothing happened e.g the psu fan didn't turn on.

Can I be fairly confident that the probl is with the psu now?

I really don't want to post it off only to be told that there is nothing wrong.

I probably could get hold of another psu tonight, though it would likely involve a 2hr round trip around London. If I did get a psu it is almost certainly not going to be a 750w (at a guess it will prob be half that- whatever someone like dell puts in their pc's)
will a much lower wat psu be able to power my system - and what steps should intake to reduce the load?

E.g i was planing to only give power to my ssd boot drive and the motherboard.

If the grapics card is attached to the mobo but not given any power will the computer turn on ok?
 
EdwardTeach said:
If the grapics card is attached to the mobo but not given any power will the computer turn on ok?
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The pc will turn on, but if you haven't plugged the power into the GPU then you're not going to get any output on your monitor ;)

Pointless getting a 300 watt psu for that rig, you'll need a half decent 500 watt minimum.

By the sounds of it your psu is most definately nailed, get it RMAd as soon as you can.
 
I wasn't planning to get a 300w psu to run the computer, just to try turning it on- so that I could 100% confirm that the fault lies in my psu.

If I got a 300w psu, and plugged in my mobo, 5850, ssd etc would the computer turn on?

If it did would I be risking blowing the psu?
 
But you've already proved that the psu is at fault, ie loud bang and no output via the old watercooling black and green cable trick :confused:

Just RMA the psu and wait for a new one to be returned in the post.

If you need to use your pc buy another suitable psu, don't try and run it on some generic 300w psu, that's just asking for trouble!
 
EdwardTeach said:
Ok guys I have tried the paperclip "technique"! Thanks for the diagram Speed.

Nothing happened e.g the psu fan didn't turn on.

Can I be fairly confident that the probl is with the psu now?
Click to expand...

Yes, assuming the fuse is still fine after you checked it and the PSU is getting power (check the plug and rocker switch on the back of the PSU). Then yes, with the green and black wires shorted on the 24 pin ATX connector the PSU should have started.

Unless you have a decent retailer near you, it may pay to just order something online. I'd recommend changing makes personally, had some issues with Corsair myself although it is personal opinion. Get something decent now, assuming it fixes the problem you can then RMA the Corsair without any worries of it being fine or having a lot of downtime.
 
coupe69 said:
But you've already proved that the psu is at fault, ie loud bang and no output via the old watercooling black and green cable trick :confused:

Just RMA the psu and wait for a new one to be returned in the post.

If you need to use your pc buy another suitable psu, don't try and run it on some generic 300w psu, that's just asking for trouble!
Click to expand...

I agree, either buy something better to replace it and sell the returned unit or just wait for the RMA to complete. If it is under 1 year old the retailer should deal with the warranty so it should be quicker.

Running any mid range to high end system on a cheap PSU you are using for a short time is a waste of money and time, it could easily cause more problems.
 
If the PSU is under a year old then I don't see why it shouldn't be quick, depends on the stock they hold however.
 
What is likely to have caused the problem in the first place?

I don't want get a replacement only for that to blow up as well.

(the computer had just been used "normally" no overclocking,and had only been in 5min when it blew)
 
EdwardTeach said:
What is likely to have caused the problem in the first place?

I don't want get a replacement only for that to blow up as well.

(the computer had just been used "normally" no overclocking,and had only been in 5min when it blew)
Click to expand...

How new of a build was it? Any recent changes?

It is likely to just be a faulty part of the PSU, but it could have shorted on something.
 
Fairly new build, don't remember exactly but aprox 4-6 weeks.

Nothing has been changed for over a week (and that was just reseating the CPU heatsink)

I am just surprised this happened with a brand new corsair. Guess I was just unlucky:
 
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