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Killing Power Supplies

Last response: in Components
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February 12, 2012 5:05:42 AM

Hi All,
Having some issues with my PC.
Just moved house and dusted it out and now its dead...
It's killed its power supply (thermaltake 430W)
Was in the middle of booting up when I left the room to come back and find it dead.
Won't turn on at all now.
I can short the green PSU wire and have the power supply boot, but its push out rather high voltages:
+5V rail is about 6.6V
+12V rail is about 15V


Ok, so I've grabbed another power supply, and had exactly the same issue (I even left the room)
This time the PSU is a no namer, and the failed voltages are much higher,
+5V rail is about 20V
+12V rail is about 30V

System is:
Gigabyte GA-MA790XT-UDP4
AMD X4 Athalon 945
Gigabyte GV-210D3 vidoe card. (only 4 weeks old)
Got 2 hard drives running in this machine,
along with a DVD drive and a 3.5"

I'm out of power supplies and out of ideas....
I've got a hunch its the mother board, it claims to be ultra durable, but it seems i've had nothing but problems with it :( 

More about : killing power supplies

a c 274 ) Power supply
February 12, 2012 5:11:46 AM

Are you saying you moved to a different house aka address?
Or cleaned house.
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February 12, 2012 5:16:24 AM

yeah, moved to a different house.
several other PC's here are fine.
My wife's computer got dusted out with mine at the same time...

When I say dusted out, I mean with an air compressor.
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a c 274 ) Power supply
February 12, 2012 5:21:50 AM

CamZH said:
yeah, moved to a different house.
several other PC's here are fine.
My wife's computer got dusted out with mine at the same time...

When I say dusted out, I mean with an air compressor.

I'd be concerned about testing out the particular wall outlet you plugged the units into.
Houses have all sorts of surprises.
The wiring may be wrong in that socket.
Just an idea.
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February 12, 2012 5:29:03 AM

davcon said:
I'd be concerned about testing out the particular wall outlet you plugged the units into.
Houses have all sorts of surprises.
The wiring may be wrong in that socket.
Just an idea.


Sounds like a fair suggestion,
But there is another PC plugged into the same outlet and its fine.
This house is relativly new, so cabling should be ok.
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February 12, 2012 5:40:58 AM

ok,
Just tested both of the hard drives in an external caddy,
No problems there...

Ant with the cheapy PSU I only have the 2 hard drives connected, so not likly it was the DVD or Floppy drive. (i'm not really sure why I still have a floppy...)
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a c 274 ) Power supply
February 12, 2012 5:50:51 AM

Your readings are overvoltages for ATX 2.2 tolerance levels on both units.
Which suggest the units are shutting down to protect themselves.
http://pcsupport.about.com/od/insidethepc/a/power-suppl...
I worked in new home and home construction for a number of years.
You don't want to know some of the stuff i've seen.
I'd have the wall socket checked out.
Obviously you have the red voltage switch on the units set to the appropriate voltage 110v/115v for N.A.
And you can have one socket work in an outlet and the other faulty.
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February 12, 2012 6:01:34 AM

davcon said:
Your readings are overvoltages for ATX 2.2 tolerance levels on both units.
Which suggest the units are shutting down to protect themselves.
http://pcsupport.about.com/od/insidethepc/a/power-suppl...
I worked in new home and home construction for a number of years.
You don't want to know some of the stuff i've seen.
I'd have the wall socket checked out.


Like I said before, there is another PC plugged into the same power board, and that is fine.
This machine is pluged into the same outlet also...
So I dont think its an outlet issue.

I'm thinking its the motherboad at this rate...
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a c 274 ) Power supply
February 12, 2012 6:07:07 AM

And yes you're right once you've determined the wall oulet and psu are fine the next component to test is the mobo.
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February 12, 2012 6:25:51 AM

davcon said:
And yes you're right once you've determined the wall oulet and psu are fine the next component to test is the mobo.


Right,
But how am I to test a mother board that is killing PSU's ?
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a c 87 ) Power supply
February 12, 2012 9:25:23 AM

Air compressor? Thats a bit much.

How did you get the reading for the PSUs? My guess assuming the wiring is ok is that you forced to much air in there and broke something. Twice.
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February 12, 2012 10:42:28 PM

4745454b said:
Air compressor? Thats a bit much.

How did you get the reading for the PSUs? My guess assuming the wiring is ok is that you forced to much air in there and broke something. Twice.



Been using an air compressor to dust out PC's for years, never had problems before.
The 2nd power supply didnt see the air compressor.

As for the voltages, been powering up the supply by pulling the power on to ground (shorting green to black)
And then using a multimeter.
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!