Disaster... PC turn off and dead

NutterzUK

NutterzUK

NutterzUK

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Joined
18 Feb 2010
Posts
940
Hi,

I was just relaxing, playing a flash game when I hear a kind of electric cracking sound... then the "bump" noise my speakers make when you turn off the pc or unplug the input, and everything turns off.

When it's off, it made a slight buzz noise for about half a second, so I pulled the plug out of the mains. After plugging it all back in... when I switch the PSU on I hear the "bump" noise my speakers make... a light on the motherboard lights up for probably less than 0.1 of a second, then turns off and that's it.

Rats. I have projects etc on there which are really important. I would say it's a really bad time for it.. but when is a good time?

I'm assuming it's the PSU. I don't know if that could damage anything else in my PC, or what happened.
Is there a way to test if it was the PSU? What does this sound like to you?

It's a Corsair TX650, about 3 years old.
It was powering crossfire 6850s, an i7 (not overclocked), 24gb ram, mouse, keboard, 2x 1TB WD Greens, 1 Intel X25M SSD, the g1 sniper motherboard.

Uhhhh! Any advice would be really appreciated. I see overclockers have offers on PSUs for today.. haha.
 
If you remove all electrical connections from the PC and just have a fan plugged into one of the molex connections and link out Pins 13 & 14 on the main ATX connector (dont count the exttra 4 pins) plug the psu into the mains and hopefully the PSU should start.

Do you have a multimeter handy?
 
RJC said:
If you remove all electrical connections from the PC and just have a fan plugged into one of the molex connections and link out Pins 13 & 14 on the main ATX connector (dont count the exttra 4 pins) plug the psu into the mains and hopefully the PSU should start.

Do you have a multimeter handy?
Click to expand...


I wish I had a multimeter handy :(. I just graduated and live in a rented house so have kind of limited things as I need to move a lot.

Ok, i'll do that. It'll take a little bit of time to unplug everything... the PSU of course had wires going all around the case.
 
Counting 13 from left to right or.. top left.. bottom left?

I had a quick look online and it seems the green and any black will do.
Will this be ok?
 
Last edited:
Hmm.
The fan turned on.
Part of me was hoping it just would do nothing then I would know exactly what the problem is.

Any more things I can try?
Thanks!
 
Give the mobo a good look over for any visible damage

Build the system outside the case on a non-conductive surface.

If still the same, reduce component count to the essentials, use on-board graphics if the motherboard has the connections, 1 stick of ram, 1 boot drive no gpus at first, or only 1 (try both on their own).

It could still be the psu - able to power a fan but not the system.
 
There is nothing immediately obvious with the motherboard.

So... have everything unplugged. I then plugged in the 2 4 pin connectors and the main ATX connector into the motherboard, with the memory still in. All hard drives, optical drives and the graphics card unplugged.

I turned it on... it worked.
I'm now going to try plugging in my graphics card again, as currently there is no display ( it has no on board graphics )
 
Hi,

My computer is back on. Nothing seems damaged. I'm not sure at all what happened and so now I'm fairly worried.

I plugged now everything back in, other than the second graphics card ( I was just about to take that one out anyway as I'm moving from crossfire to a single card - selling one first so I can still use my PC while I buy one ).

I don't know if I want to plug it back in at the risk of having the problem again. Should 650w be plenty to power the system I have?
I'm considering buying an 850w PSU if it could be the problem.

Thanks,
 
haha.. yep.. got lucky.

Hmmmmm.
Doesn't fill me with confidence though. I'm usually really careful with my PC and look after it since it's one I built... when stuff like this happens I tend to lose all faith in my desktop and go out and buy a whole load of things.

New SSD, PSU and soon graphics card in the post....
Oh and of course.. windows backup is running now.
 
Did you do the obvious clear capacitors trick?

Remove power cable, hold power button??

Odds are it just had some power stuck in the caps that was fooling it into powering off.
 
Could also clear the CMOS. Ive had a mobo that refused to turn on till my CMOS was cleared. Very odd.

Oh, and can I just quickly throw this out there....

BACK UP YOUR DAMN WORK!!! Only fools keep a single digital copy!
 
NutterzUK said:
No, but next time my PC is off I shall do that.

I hope that was the problem :)
Click to expand...

Most likely it was


Arsonist said:
Could also clear the CMOS. Ive had a mobo that refused to turn on till my CMOS was cleared. Very odd.

Oh, and can I just quickly throw this out there....

BACK UP YOUR DAMN WORK!!! Only fools keep a single digital copy!
Click to expand...
Agreed.

Especially with numerous free examples from SkyDrive, Google
 
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