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4 pin 12v atx power supply connected the wrong way...



 
 
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  #11  
Old April 1st 04, 02:22 AM
kony
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On 31 Mar 2004 16:00:16 -0800, (Mike Henley) wrote:


Okay... i've been to the store, i got some 5a fuses... so here's the
story... i replaced the fuse in the good PSU's power cable (mains to
PSU) and it worked... the computer is running fine, i downloaded video
from a cam, installed apps, everything is more or less running just
fine with no problem...


This still makes no sense... your (AC wall outlet to power supply) cords
have fuses? I've seen cords with fuses, but never for a PC power supply.

then that PSU that was connected when i had the accident (the
firecracker sound)... well, i replaced the fuse in its cable (mains to
PSU cable)... and it didn't run... maybe the firecracker sound came
from the PSU after all... i don't know... but that PSU isn't working
now... it was a high-end 550w PSU... i'm sorry it blew up 'cos it was
pricey but i'm sorta glad it sacrificed itself...


What brand was the 550W?
If you leave it disconnected from AC for a few minutes and open it, you
may see the damage. If a cap blew up you might see some paper-like foil
loose in the casing, if the damaged cap isn't intact enough to be
identifiable.

i find it strange that you say a normal cable doesn't have a fuse...
'cos i have those two PSUs and 3 cables... i can't remember which is
which... two of them are 5amp-fused, one is not... as mentioned above
about two fused ones, in addition, the unfused one gave me a nasty
spark when i plugged it in so i gave up on it... i was lucky that it
was the faulty psu that was connected rather than the good one when
that happened... so, i decided i won't be using the unfused cable
again.


There might have been something wrong with the power supply to begin with,
it shouldn't be drawing more than a fraction of an amp before the system
is powered on.
  #14  
Old April 1st 04, 09:26 PM
Mike Henley
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kony wrote in message . ..
On 31 Mar 2004 16:00:16 -0800, (Mike Henley) wrote:


Okay... i've been to the store, i got some 5a fuses... so here's the
story... i replaced the fuse in the good PSU's power cable (mains to
PSU) and it worked... the computer is running fine, i downloaded video
from a cam, installed apps, everything is more or less running just
fine with no problem...


This still makes no sense... your (AC wall outlet to power supply) cords
have fuses? I've seen cords with fuses, but never for a PC power supply.


I have those fused wires and this unfused one... i'm not sure which
belongs to which... but what i reported is how it happened...

then that PSU that was connected when i had the accident (the
firecracker sound)... well, i replaced the fuse in its cable (mains to
PSU cable)... and it didn't run... maybe the firecracker sound came
from the PSU after all... i don't know... but that PSU isn't working
now... it was a high-end 550w PSU... i'm sorry it blew up 'cos it was
pricey but i'm sorta glad it sacrificed itself...


What brand was the 550W?
If you leave it disconnected from AC for a few minutes and open it, you
may see the damage. If a cap blew up you might see some paper-like foil
loose in the casing, if the damaged cap isn't intact enough to be
identifiable.


It's vantec stealth 520w... a pretty nice one... i won't be opening
'cos it has a sticker that says warranty void if removed


i find it strange that you say a normal cable doesn't have a fuse...
'cos i have those two PSUs and 3 cables... i can't remember which is
which... two of them are 5amp-fused, one is not... as mentioned above
about two fused ones, in addition, the unfused one gave me a nasty
spark when i plugged it in so i gave up on it... i was lucky that it
was the faulty psu that was connected rather than the good one when
that happened... so, i decided i won't be using the unfused cable
again.


There might have been something wrong with the power supply to begin with,
it shouldn't be drawing more than a fraction of an amp before the system
is powered on.


hmmm... what do u suggest i do
  #16  
Old April 1st 04, 09:49 PM
larrymoencurly
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General Schvantzkoph wrote in message ...

BTW isn't the 4 pin connector keyed? I would have thought
that it would be impossible to do what you did.


Never underestimate the ability of people to get around things like
that.

I thought the same of PC133 memory, but my friend managed to not only
plug in a module backwards but also lock the latches. Mobo and memory
were OK (module got hot), but the PSU fried a transistor.
  #18  
Old April 1st 04, 10:26 PM
w_tom
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Fuse is necessary because UK power board breaker is too
large for current capacity of power cords. US has no such
problem because US does not use ring circuits to power wall
receptacles and does not power those rings with 32 amp
breakers. All this safety stuff on both sides of the pond
have long been proven as necessary or unnecessary by decades
of experience.

One important circuit breaker is a 15 amp breaker on US
power strips. Breaker often missing on many grossly
overpriced protector type power strips and yet may be found on
$3 non-protector type strips. No breaker on that power strip
is, for example, why a kennel recently killed many dogs in the
resulting fire. Reason for this breaker should not be
confused with reason for fuse on UK power cords.

larrymoencurly wrote:
The fuse in the cord is probably a good safety idea that isn't used in
all parts of the world, like North America.

Is it a good idea to keep using that PSU that went ka-boom? Because
if a filter capacitor was destroyed, the PSU could be putting out
pulsating DC on one of the rails, and only the filter capacitors on
the mobo are keeping the DC steady and allowing the PSU regulation to
work.

  #19  
Old April 2nd 04, 11:24 PM
Jon Danniken
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"larrymoencurly" wrote:
The fuse in the cord is probably a good safety idea that isn't used in
all parts of the world, like North America.


Fuses are for girly-men; real men just stick a paper clip in there.

Jon
 




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