Antec Power Supply with ASUS P5W DH Delux Mobo

[dev648237923]

My ASUS p5w dh delux wont start...

The green sb_pwr LED lights up but none of the fans run and also the power
supply fan does not run.

I checked the power supply on another motherboard and it worked OK. The
power supply is an Antec SP-450 smart power (some Antec power supplies have
problems with some ASUS boards I heard??? -- does anyone know of issue with
SP-450 from Sonata II case and ASUS P5W DH Delux board?).

It's odd the power supply fan dooes not even run -- like the board is
shorting it out?. I tried it with just mobo -- no
cpu/memory/vidcard/hdd/etc.
I tried with and without the 4pin atx12v.

I used all caution for static sensitivity.

Thank you for any ideas!

p.s. I'll try another manufacturers power supply as soon as I can get one --
will post if it turns out to be Antec incompatibility for others to know.

 

[Chris Hill]

My ASUS p5w dh delux wont start...

The green sb_pwr LED lights up but none of the fans run and also the power
supply fan does not run.

I checked the power supply on another motherboard and it worked OK. The
power supply is an Antec SP-450 smart power (some Antec power supplies have
problems with some ASUS boards I heard??? -- does anyone know of issue with
SP-450 from Sonata II case and ASUS P5W DH Delux board?).

It's odd the power supply fan dooes not even run -- like the board is
shorting it out?. I tried it with just mobo -- no
cpu/memory/vidcard/hdd/etc.
I tried with and without the 4pin atx12v.

I used all caution for static sensitivity.

Thank you for any ideas!

p.s. I'll try another manufacturers power supply as soon as I can get one --
will post if it turns out to be Antec incompatibility for others to know.

Have you tried pulling the board and placing it on a non-conductive
surface, sounds like it could be shorting out, or you couldn've just
gotten a bad board.

 

[dev648237923]

Yes -- board is on its anti-static bag on table.
I will try a different psu tonight and so confirm it is the baord.
***One question -- is it OK to run the board with no cpu/vid/etc -- just the
board itself -- to confirm the power supply will run (that is to see if the
power supply fans will turn)
Thanks

 

[Guest]

Yes -- board is on its anti-static bag on table.

That probably does no harm, but it's not a good practice since most
bags are metal-in but not metal-out, meaning they provide anti-static
protection only on the inside, not the outside. It's safer to place
the motherboard on the anti-static foam sheet included with it.

is it OK to run the board with no cpu/vid/etc -- just the board itself -- to
confirm the power supply will run (that is to see if the power supply fans
will turn)

Yes, but without the CPU it may not turn on.

You can test a power supply without connecting it to anything if you
ground its green wire to one of its black wires (there are black wires
on each side of the green wire) with a bent paperclip, although a few
supplies, such as high efficiency Seasonics and Antec Neos, require
some load on the +12V or +5V, which can usually be provided by a hard
drive or with an optical drive containing a disk.

 

[Paul]

Yes -- board is on its anti-static bag on table.
I will try a different psu tonight and so confirm it is the baord.
***One question -- is it OK to run the board with no cpu/vid/etc -- just the
board itself -- to confirm the power supply will run (that is to see if the
power supply fans will turn)
Thanks

The switch on the back of the PSU is not the whole story. You
also need to connect the power switch to the PANEL header. It
takes a momentary contact of the two power switch pins on the
PANEL header, to make a motherboard start. Otherwise it
will just sit there with the green LED glowing.

When you switch on the PSU at the back, that causes +5VSB to
flow to the motherboard. The green LED on the motherboard lights
up. When you close the two contacts on the PANEL header (by pressing
the power button on the front of your computer case), a chip on the
motherboard latches the switch closure, and sends the PS_ON# signal
to the power supply. Then, the power supply sends back the
+3.3, +5, +12V main rails to the motherboard, and the computer
will start to POST.

And, yes, I've run a bare board with a power supply. To test
that the Asus Vocal POST works without a CPU. In this case, it
would be safest with a supply that does not have a minimum
load spec printed on the label. I see this supply does have
a minimum load requirement, in which case I'd plug the processor
into the board before testing. The processor will draw some 12V2.
Without the processor present, 12V2 would be zero load. The output
voltage might not be in spec, with zero load present, but the
extent to which the power supply does not meet its output voltage,
is not stated. If this was my hardware, I'd try it with the
processor in place.

http://www.antec.com/specs/SP450_spe.html

And for powering, both the main power connector, and the ATX
12V 2x2 square connector must be connected. The square
connector is what powers Vcore for the processor.

Paul

 

[Ghostrider]

My ASUS p5w dh delux wont start...

The green sb_pwr LED lights up but none of the fans run and also the power
supply fan does not run.

I checked the power supply on another motherboard and it worked OK. The
power supply is an Antec SP-450 smart power (some Antec power supplies have
problems with some ASUS boards I heard??? -- does anyone know of issue with
SP-450 from Sonata II case and ASUS P5W DH Delux board?).

It's odd the power supply fan dooes not even run -- like the board is
shorting it out?. I tried it with just mobo -- no
cpu/memory/vidcard/hdd/etc.
I tried with and without the 4pin atx12v.

I used all caution for static sensitivity.

Thank you for any ideas!

p.s. I'll try another manufacturers power supply as soon as I can get one --
will post if it turns out to be Antec incompatibility for others to know.

While the Antec 450 Watt is a good PSU, it might be a little
on the light weight side for the ASUS P5WD series, especially
if a Pentium-D Duo Core CPU's are being used. And as for doing
testing of the PSU, the CPU, video card and RAM needs to be
socketed, at the very least. And the anti-stat bag is not the
ideal surface either. Use a non-conducting pad or surface.

 

[dev648237923]

The problem turned out to be the board shipped from the factory with the
jumper in the CLEAR position and the board will not start when that is the
setting! Changed jumper and all is well now!