Powering On Problem

[PawsForThought]

I had an Antec 400 True psu that died on me. So I decided to replace it with
the Antec Trueblue 480. After installing it, when I would start up my
computer, it would turn on for a couple seconds, then the power would go off
completely for about 5 seconds, then the computer would power on normally.
This didn't happen every single time the computer started, but often enough
that I thought I had another bad psu. So I took the Antec back and got a
Thermaltake Purepower 560. Everything was fine for a few days but then this
morning when I turned on my computer, the same thing happened wherein I would
power up, within a couple seconds the computer would power off for about 5
seconds, then power up fine. So...this leads me to believe it was never the
psu but something else. My thoughts are going to the Soyo mobo. Does anyone
have any thoughts on this? Thanks in advance for any help. Below are my
specs:

P4 3.2C on Soyo SY-P4I865PE Plus Dragon 2 v. 1.0
Corsair TWINX1024-3200XL (2X512)
BFG GeForce 5900 Ultra
Audigy soundcard
WD SE 80G hdd w/8 mb cache
BenQ DVD Writer, CDRW & Lite On DVD Rom
Thermaltake Purepower 560 psu
WinXP Pro - SP1

 

[Noozer]

I had an Antec 400 True psu that died on me. So I decided to replace it with
the Antec Trueblue 480. After installing it, when I would start up my
computer, it would turn on for a couple seconds, then the power would go off
completely for about 5 seconds, then the computer would power on normally.

How are you turning it on/off?

Could also be a bad mainboard or a dying peripheral that is drawing too much
power.

 

[DaveW]

Sounds most likely like a defective motherboard.

 

[PawsForThought]

From: "Noozer" (e-mail address removed)

How are you turning it on/off?

Thanks for your reply. I really appreciate it. I'm turning it on with the
power switch on the front of the computer. One odd thing is when I put this
machine together and was hooking up the leads for the power switch, the reset
button, the HDD led, and the speaker, all the leads went in one way, meaning
one direction. But the HDD led would only work if I reversed it.

Could also be a bad mainboard or a dying peripheral that is drawing too much
power.

I'm thinking it's this crappy Soyo board. I never had the problem until I
installed it. I sure hope it's not a peripheral.

 

[PawsForThought]

From: "DaveW" (e-mail address removed)

Sounds most likely like a defective motherboard.

Thanks, Dave. I think you're probably right. I know I'm not the first person
to have problems with this particular Soyo board. No wonder it was free after
rebate (so long as the rebate comes through that is). I'm thinking of getting
either an Asus or Abit. Aren't those supposed to be pretty reliable brands?

One other question - assuming it is a bad motherboard, it won't hurt anything
to keep using it like this for another month or so will it? I don't want to
stress any of my components. It does seem once it does power on, everything
runs okay.

 

[Noozer]

Thanks for your reply. I really appreciate it. I'm turning it on with the
power switch on the front of the computer.

With the front switch it should just come on. Many PSU's will "light" the
computer for a second or two when plugged into an outlet or powerbar
switched on.

One odd thing is when I put this
machine together and was hooking up the leads for the power switch, the reset
button, the HDD led, and the speaker, all the leads went in one way, meaning
one direction. But the HDD led would only work if I reversed it.

Only the LEDs, and possibly the speaker have a polarity. The rest work
regardless of which way they go.

I'm thinking it's this crappy Soyo board. I never had the problem until I
installed it. I sure hope it's not a peripheral.

Most likely the mainboard... I only mentioned the peripherals because
anything is possible.

 

[kony]

I had an Antec 400 True psu that died on me. So I decided to replace it with
the Antec Trueblue 480. After installing it, when I would start up my
computer, it would turn on for a couple seconds, then the power would go off
completely for about 5 seconds, then the computer would power on normally.
This didn't happen every single time the computer started, but often enough
that I thought I had another bad psu. So I took the Antec back and got a
Thermaltake Purepower 560. Everything was fine for a few days but then this
morning when I turned on my computer, the same thing happened wherein I would
power up, within a couple seconds the computer would power off for about 5
seconds, then power up fine. So...this leads me to believe it was never the
psu but something else. My thoughts are going to the Soyo mobo. Does anyone
have any thoughts on this? Thanks in advance for any help. Below are my
specs:

P4 3.2C on Soyo SY-P4I865PE Plus Dragon 2 v. 1.0
Corsair TWINX1024-3200XL (2X512)
BFG GeForce 5900 Ultra
Audigy soundcard
WD SE 80G hdd w/8 mb cache
BenQ DVD Writer, CDRW & Lite On DVD Rom
Thermaltake Purepower 560 psu
WinXP Pro - SP1

Unplug all the front-panel (power, reset, LEDs, etc) wiring
and see if the behavior continues if you turn system on by
shorting together the power pins.

Hook a multimeter up to the PS-On ATX connector pin and
monitor what the voltage level is before, during events in
the sequence you describe.

If all else fails strip the system down to bare essentials
and source a different, low-powered video card to
temporarily swap in... or at least unplug the supplimental
power to the GF5900 so it's running at the lower speed
caused by doing that. I don't think it's a PSU capacity
issue but to leave no stone unturned...

 

[Spajky]

I had an Antec 400 True psu that died on me. So I decided to replace it with
the Antec Trueblue 480. After installing it, when I would start up my
computer, it would turn on for a couple seconds, then the power would go off
completely for about 5 seconds, then the computer would power on normally.
This didn't happen every single time the computer started, but often enough
that I thought I had another bad psu. So I took the Antec back and got a
Thermaltake Purepower 560. Everything was fine for a few days but then this
morning when I turned on my computer, the same thing happened wherein I would
power up, within a couple seconds the computer would power off for about 5
seconds, then power up fine. So...this leads me to believe it was never the
psu but something else. My thoughts are going to the Soyo mobo. Does anyone
have any thoughts on this?

could be that you have got a surge to your MoBo & affected caps on it.
Now they are degrading now faster & faster & soon will some of them
start bulging ... but I could be wrong also ...