ASUS P4T-E + Antec TrueBlue 480 Power Supply = Help Me!

  • Thread starter Thread starter Rich
  • Start date Start date
R

Rich

I just got the Antec power supply today, to replace a no-name 300W I had
been using.

When everything was reconnected, the motherboard (green) light would stay
lit, but the machine would not power up otherwise. At all. No fans, no
lights on the PSU, nothing.

I pulled the connections on all the devices, and just left the three
connectors plugged into the motherboard. Still nothing.

I then unplugged the AUXPWR connector from the motherboard, and the machine
booted normally.

Hmm.

I then reconnected all my other devices (fans, 2 HDDs, 2 CD/DVD drives,
floppy), and the machine would not boot.

I unplugged everything but the floppy (because in my case, the floppy has
the most inconvenient-to-reach connector), and the machine would not boot.

I then unplugged the floppy, and the machine would boot normally.

I reconnected everything except the floppy & the AUXPWR connector, and the
machine boots normally.

I don't understand what I'm learning from this process. Can anyone help me
figure out what's going on? I don't use my floppy drive often, but I have
used it recently so as far as I know, it's working fine.

I never really understood what the AUXPWR connector was for, but it was
always connected with my previous PSU. The manual lists it as optional, but
says nothing else. I don't see why the machine wouldn't boot with that
connected? Ditto with the floppy drive?

Thoughts? Thanks.

~ Rich
 
You should only connect the ATX Power Connector + 1 additonal power
connector to the MB (not all three.) Asus added the standard 4-pin molex
connector to accomodate customers with older, non-P4 Aux Power Connector,
equipped power supplies.

No clue about you floppy. Try another one? Try another cable?

Rich said:
I just got the Antec power supply today, to replace a no-name 300W I had
been using.

When everything was reconnected, the motherboard (green) light would stay
lit, but the machine would not power up otherwise. At all. No fans, no
lights on the PSU, nothing.

I pulled the connections on all the devices, and just left the three
connectors plugged into the motherboard. Still nothing.

I then unplugged the AUXPWR connector from the motherboard, and the machine
booted normally.

Hmm.

I then reconnected all my other devices (fans, 2 HDDs, 2 CD/DVD drives,
floppy), and the machine would not boot.

I unplugged everything but the floppy (because in my case, the floppy has
the most inconvenient-to-reach connector), and the machine would not boot.

I then unplugged the floppy, and the machine would boot normally.

I reconnected everything except the floppy & the AUXPWR connector, and the
machine boots normally.

I don't understand what I'm learning from this process. Can anyone help me
figure out what's going on? I don't use my floppy drive often, but I have
used it recently so as far as I know, it's working fine.

I never really understood what the AUXPWR connector was for, but it was
always connected with my previous PSU. The manual lists it as optional, but
says nothing else. I don't see why the machine wouldn't boot with that
connected? Ditto with the floppy drive?

Thoughts? Thanks.

~ Rich






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Are you sure that you do not have the floppy cable installed
incorrectly? e.g. backwards, or off by one pin?

What you are seeing does not make sense, I agree.
 
I just got the Antec power supply today, to replace a no-name 300W I had
been using.

When everything was reconnected, the motherboard (green) light would stay
lit, but the machine would not power up otherwise. At all. No fans, no
lights on the PSU, nothing.

I pulled the connections on all the devices, and just left the three
connectors plugged into the motherboard. Still nothing.

I then unplugged the AUXPWR connector from the motherboard, and the machine
booted normally.

Hmm.

I then reconnected all my other devices (fans, 2 HDDs, 2 CD/DVD drives,
floppy), and the machine would not boot.

I unplugged everything but the floppy (because in my case, the floppy has
the most inconvenient-to-reach connector), and the machine would not boot.

I then unplugged the floppy, and the machine would boot normally.

I reconnected everything except the floppy & the AUXPWR connector, and the
machine boots normally.

I don't understand what I'm learning from this process. Can anyone help me
figure out what's going on? I don't use my floppy drive often, but I have
used it recently so as far as I know, it's working fine.

I never really understood what the AUXPWR connector was for, but it was
always connected with my previous PSU. The manual lists it as optional, but
says nothing else. I don't see why the machine wouldn't boot with that
connected? Ditto with the floppy drive?

Thoughts? Thanks.

~ Rich
Click to expand...

The solution could be a simple one. Someone with another model of Asus
motherboard, did a visual examination of his board, and found the
plastic 2x2 ATX12V connector on the motherboard was rotated 180 degrees.
This shorts the +12V to GND, and on a well designed power supply, it
will shut down after about 50 milliseconds or so. Since +12V is shorted,
the fans won't even twitch.

The other possibility is that the connector on the new power supply
end is wrong. But, you get the basic idea.

When boards are tested on a production line, it isn't necessary to use
the connectors to operate the board. Instead, equipment can probe the
bottom of the board to make connections. As a result, there might not
be an opportunity to verify the connector position during testing.
Board "stuffing" can sometimes be checked via video camera, high
speed digitizer, and A/B comparison, to make sure everything is in
place. But, a gadget like that probably flags more product than it
passes. So, the reversed connector got missed - it might have been
soldered in by hand.

Whatever happens, post back...

HTH,
Paul
 
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