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How do I test a Power Supply?

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  • Power Supplies
  • Systems
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Anonymous
a b B Homebuilt system
a b ) Power supply
August 20, 2005 3:08:45 AM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

I got a new Antec PS. But when I plug it in
(with nothing connected to it) it doesn't seem to
run (the fan doesn't turn and there is no dc voltage
on some of the leads). Is it dead or does it require
a connection to a motherboard to work???

Thanks

More about : test power supply

Anonymous
a b B Homebuilt system
a b ) Power supply
August 20, 2005 3:08:46 AM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Lyn wrote:

> I got a new Antec PS. But when I plug it in
> (with nothing connected to it) it doesn't seem to
> run (the fan doesn't turn and there is no dc voltage
> on some of the leads). Is it dead or does it require
> a connection to a motherboard to work???

It requires the green wire on the big power connector (has 20 or 24
pins) to be grounded to one of the black wires (any will do, even
others on the same connector). Most people use a bent paperclip to
short them together.

BTW don't bother buying a PSU tester because it will say that a PSU is
fine even if one of its voltages is so way off that the computer won't
run. In my case a tester from CompUSA did this even though the +12V
rail was too low to make the disk drives spin. For the same money you
can buy a cheap digital multimeter that will be a lot more accurate and
useful for testing many other things as well.
Anonymous
a b B Homebuilt system
a b ) Power supply
August 20, 2005 5:54:12 AM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Lyn wrote:

> I got a new Antec PS. But when I plug it in
> (with nothing connected to it) it doesn't seem to
> run (the fan doesn't turn and there is no dc voltage
> on some of the leads). Is it dead or does it require
> a connection to a motherboard to work???

You may notice that the power button is on the case and connected to the
motherboard so, yes, the PSU normally needs to be connected to the
motherboard to turn it on.

You can power it up separately by connecting the green wire to ground
(black) but it also needs a minimum load to regulate properly. I keep an
old junker hard drive to plug into them for that purpose.

>
> Thanks
>
>
Related resources
Anonymous
a b B Homebuilt system
a b ) Power supply
August 20, 2005 12:40:54 PM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

In article <37xNe.37776$rp.35768@bignews1.bellsouth.net>, Lyn says...
> I got a new Antec PS. But when I plug it in
> (with nothing connected to it) it doesn't seem to
> run (the fan doesn't turn and there is no dc voltage
> on some of the leads). Is it dead or does it require
> a connection to a motherboard to work???
>
Read up about Switch Mode PSUs - they need a load to run


--
Conor

If Pac-Man affected us as kids, we'd all be running around in darkened
rooms, munching magic pills and listening to repetitive electronic
music.
Anonymous
a b B Homebuilt system
a b ) Power supply
August 20, 2005 1:25:40 PM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

David Maynard wrote:

> You can power it up separately by connecting the green wire to ground
> (black) but it also needs a minimum load to regulate properly. I keep an
> old junker hard drive to plug into them for that purpose.

Hmm! Good idea.
Anonymous
a b B Homebuilt system
a b ) Power supply
August 20, 2005 1:41:37 PM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Thanks to all (except for the one jerk). I did as you said and it does
read the correct voltage now but the fan still doesn't turn. Is it normal
for a Antec SL300S to not turn on fan until hot??
Thanks

"Conor" <conor.turton@gmail.com> wrote in message
news:MPG.1d70eee23e6c5a7198a811@news.individual.net...
> In article <37xNe.37776$rp.35768@bignews1.bellsouth.net>, Lyn says...
> > I got a new Antec PS. But when I plug it in
> > (with nothing connected to it) it doesn't seem to
> > run (the fan doesn't turn and there is no dc voltage
> > on some of the leads). Is it dead or does it require
> > a connection to a motherboard to work???
> >
> Read up about Switch Mode PSUs - they need a load to run
>
>
> --
> Conor
>
> If Pac-Man affected us as kids, we'd all be running around in darkened
> rooms, munching magic pills and listening to repetitive electronic
> music.
August 21, 2005 5:11:17 PM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Lyn wrote:
> Thanks to all (except for the one jerk). I did as you said and it does
> read the correct voltage now but the fan still doesn't turn. Is it normal
> for a Antec SL300S to not turn on fan until hot??
> Thanks

Which fan? (I missed something?) I would think th eprocessor fan would
be going all th etime, dont try if it does not. Other fans may be on off
temperature controlled maybe?
--
ac
Anonymous
a b B Homebuilt system
a b ) Power supply
August 21, 2005 6:49:43 PM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

The fan in the antec is the one I am referring to.

"ac" <"aec$news"@candt.demon.co.uk> wrote in message
news:3mr96tF18dshtU2@individual.net...
> Lyn wrote:
> > Thanks to all (except for the one jerk). I did as you said and it does
> > read the correct voltage now but the fan still doesn't turn. Is it
normal
> > for a Antec SL300S to not turn on fan until hot??
> > Thanks
>
> Which fan? (I missed something?) I would think th eprocessor fan would
> be going all th etime, dont try if it does not. Other fans may be on off
> temperature controlled maybe?
> --
> ac
Anonymous
a b B Homebuilt system
a b ) Power supply
August 21, 2005 9:57:50 PM

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Lyn, <lyn777@bellsouth.net>, the straying, garlicky boxer, and slave trader,
twiddled:


> Thanks to all (except for the one jerk).

I suppose a head job is out of the question then?

--
Doug Grant <DGVREIMAN@COMCAST.NET> wrote:
> If you want to respond to my posts... then email me and
> I will either allow you to do so or not.
Anonymous
a b B Homebuilt system
a b ) Power supply
August 23, 2005 9:29:39 AM

Archived from groups: alt.comp.hardware.pc-homebuilt,alt.usenet.kooks (More info?)

JAD, <kapasitor@earthcharter.net>, the mud-beplastered, obsessive shark, and
retailer of stockings and nightcaps, swore:


> get the hell out of here

Thank you ever so much for the invitation to stay.

--
Doug Grant <DGVREIMAN@COMCAST.NET> wrote:
> If you want to respond to my posts... then email me and
> I will either allow you to do so or not.
!