Is my new power supply DOA? Am I missing something here?

  • Thread starter Thread starter Ken
  • Start date Start date
K

Ken

Sorry if the question sounds incredibly foolish, but...

I put a system together today with all new components, one of which is a
Corsair HX620 power supply. Before I put it in the system, I plugged it
in and there were no signs of life, but I thought that perhaps there has
to be a load on the supply for it to work.

I installed it in the case (Antec P182), and I have double-checked the
connections to the motherboard, which all seem correct according to the
wiring diagrams. With the motherboard connected, as well as a PCI
Express video card, not a breath of life.

The switch of the power supply is on the I, not the O, and I have tried
various combinations of the power supply switches as well as the front
panel.

What might I be missing here??? If one plugs in a new power supply even
if it is not under load, shouldn't the fan start at least?

Thanks
Ken K



--
Kenneth Krone, M.D.
San Luis Diagnostic Center
1100 Monterey, Suite 210
San Luis Obispo, CA 93401

o 805 542 9700
c 805 458 9040
f 800 635 5718

The contents of this email and any attachments are confidential. It is
intended for the named recipient(s) only. If you receive the email in
error, please notify the sender immediately and do not disclose the
contents to anyone or make copies. Federal regulation, 42 CFR, Part 2,
prohibits further disclosure.
 
Ken said:
Sorry if the question sounds incredibly foolish, but...

I put a system together today with all new components, one of which is a
Corsair HX620 power supply. Before I put it in the system, I plugged it
in and there were no signs of life, but I thought that perhaps there has
to be a load on the supply for it to work.

I installed it in the case (Antec P182), and I have double-checked the
connections to the motherboard, which all seem correct according to the
wiring diagrams. With the motherboard connected, as well as a PCI
Express video card, not a breath of life.

The switch of the power supply is on the I, not the O, and I have tried
various combinations of the power supply switches as well as the front
panel.

What might I be missing here??? If one plugs in a new power supply even
if it is not under load, shouldn't the fan start at least?

Thanks
Ken K
Click to expand...

The power supply has two switches. It has the hardware switch on the
back (0/1). But it also has soft power, controlled by the PS_ON#
signal on the main power connector.

If you connect PS_ON# to COM (ground), that causes the power supply to
run. It is the responsibility of the motherboard, to connect PS_ON# to COM,
on the main power connector, when it wants juice. So the motherboard
latches a momentary contact closure from the front panel POWER switch,
in some motherboard logic. The motherboard logic then drives PS_ON# low
and holds it low, to turn on the power supply.

You can connect PS_ON# to an adjacent COM pin, with a paper clip.
Page 37 shows the main power connector wire colors on a 24 pin power connector,
and you want to connect the green wire to an adjacent black COM one.
Then the fan should start spinning. I connect my home made load box to
the power supply, when doing this. Then I can measure the voltages with a
multimeter and verify all is well.

http://www.formfactors.org/developer/specs/ATX12V_PSDG_2_2_public_br2.pdf

Paul
 
Paul said:
The power supply has two switches. It has the hardware switch on the
back (0/1). But it also has soft power, controlled by the PS_ON#
signal on the main power connector.

If you connect PS_ON# to COM (ground), that causes the power supply to
run. It is the responsibility of the motherboard, to connect PS_ON# to COM,
on the main power connector, when it wants juice. So the motherboard
latches a momentary contact closure from the front panel POWER switch,
in some motherboard logic. The motherboard logic then drives PS_ON# low
and holds it low, to turn on the power supply.

You can connect PS_ON# to an adjacent COM pin, with a paper clip.
Page 37 shows the main power connector wire colors on a 24 pin power
connector,
and you want to connect the green wire to an adjacent black COM one.
Then the fan should start spinning. I connect my home made load box to
the power supply, when doing this. Then I can measure the voltages with a
multimeter and verify all is well.

http://www.formfactors.org/developer/specs/ATX12V_PSDG_2_2_public_br2.pdf

Paul
Click to expand...
Well, after fiddling with the connections (pin 16 [green] plus pin 15,
then 17, 18, then 19, nothing happened. I played around with the
connections from the wall into the interior of the computer and it
works! Go figure. I had done that already. Anyway, thanks. You
taught me a trick about testing the power connections.

Thanks.
Ken K


--
Kenneth Krone, M.D.
San Luis Diagnostic Center
1100 Monterey, Suite 210
San Luis Obispo, CA 93401

o 805 542 9700
c 805 458 9040
f 800 635 5718

The contents of this email and any attachments are confidential. It is
intended for the named recipient(s) only. If you receive the email in
error, please notify the sender immediately and do not disclose the
contents to anyone or make copies. Federal regulation, 42 CFR, Part 2,
prohibits further disclosure.
 
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