New system won't post

Yesterday I assembled a new system:
Biostar NF4U AM2G mobo
Sapphire X1950XT Pro PCI-E video card
AMD 400+ X2 cpu
Apevia 500W PSU
2 x 1Gb Wintec AmpX 6400 DDR2 ram
Seagate 400Gb SATA hd
Seagate 120 IDE hd
2 Lite-On DVD burners

That's it, nothing too fancy. When I first powered on, it posted, and I
went into BIOS to change boot order to boot from CD. Then I powered down,
and left it overnight. Today when I pressed the power button, no post.
WTF? All that happens is there is power for a split second, just enough for
the fans to spin and for the keyboard LED's to flicker for a moment. Then
nothing, except the power light remains on on the case. If I hold power
button down for 5 sec, power led shuts off, and when I press power again,
same thing.

I have just taken everything out of the case and reseated the CPU, RAM,
video card... no change. I have never experienced this before. Any ideas?
I'm racking my brain, but there are so few symptoms I can't even make a
reasonable diagnosis. Unfortunately I don't have a spare PSU to try. Could
it be the PSU? mobo? I can't think what else could be the culprit.

Thanks for your advice,
Matt

On 21 Jun, 23:37, "Matty Anderson" <matty...@hotmail.com> wrote:
> Yesterday I assembled a new system:
> Biostar NF4U AM2G mobo
> Sapphire X1950XT Pro PCI-E video card
> AMD 400+ X2 cpu
> Apevia 500W PSU
> 2 x 1Gb Wintec AmpX 6400 DDR2 ram
> Seagate 400Gb SATA hd
> Seagate 120 IDE hd
> 2 Lite-On DVD burners
>
> That's it, nothing too fancy. When I first powered on, it posted, and I
> went into BIOS to change boot order to boot from CD. Then I powered down,
> and left it overnight. Today when I pressed the power button, no post.
> WTF? All that happens is there is power for a split second, just enough for
> the fans to spin and for the keyboard LED's to flicker for a moment. Then
> nothing, except the power light remains on on the case. If I hold power
> button down for 5 sec, power led shuts off, and when I press power again,
> same thing.
>
> I have just taken everything out of the case and reseated the CPU, RAM,
> video card... no change. I have never experienced this before. Any ideas?
> I'm racking my brain, but there are so few symptoms I can't even make a
> reasonable diagnosis. Unfortunately I don't have a spare PSU to try. Could
> it be the PSU? mobo? I can't think what else could be the culprit.
>
> Thanks for your advice,
> Matt

All I can suggest is to strip it to the bare minimum to narrow things
down. Remove all cards & drives, see if it stays up. After that its
playing swaps with the remaining bits. mobo and psu have to be the
prime suspects.


NT

Hmmmmmm. Seems as if I had that problem once. A long time ago. I think it
was a CPU fan that wasn't working. Try a minimum set=up, video card,
keyboard, memory. Unplug all drives. Leave case open and watch for the CPU
fan to start immediately after starting up.
HTH

That minimum setup is exactly what I've got right now (with the CPU, too).
Yes, the CPU fan does spin. There are 6 fans: 2 in the PSU, CPU, case, and
northbridge, and they all spin for just a second, and then slow down to a
stop. The obvious symptom is that power is only staying on for a split
second, then quitting. I'm guessing it sounds like it starts with the PSU.


"Travis McGee" <nothere@aol.com> wrote in message
news:Q2Eei.2090$iz5.1208@newsread4.news.pas.earthl ink.net...
> Hmmmmmm. Seems as if I had that problem once. A long time ago. I think it
> was a CPU fan that wasn't working. Try a minimum set=up, video card,
> keyboard, memory. Unplug all drives. Leave case open and watch for the CPU
> fan to start immediately after starting up.
> HTH
>
>

"Matty Anderson" <mattya25@hotmail.com> wrote in message
news:5e0hjdF35fbv3U1@mid.individual.net...
> That minimum setup is exactly what I've got right now (with the CPU, too).
> Yes, the CPU fan does spin. There are 6 fans: 2 in the PSU, CPU, case,
and
> northbridge, and they all spin for just a second, and then slow down to a
> stop. The obvious symptom is that power is only staying on for a split
> second, then quitting. I'm guessing it sounds like it starts with the
PSU.
>

If you're SURE all your front headers all attached correctly, then yes, you
need to sub another PSU to test.

"Travis McGee" <nothere@aol.com> wrote in message
news:xmEei.2733$W_6.1323@newsread1.news.pas.earthl ink.net...
> If you're SURE all your front headers all attached correctly, then yes,
you
> need to sub another PSU to test.
>
A quick follow up......what I had in mind was you attached the PS to the
re-set switch. If not, I recall the PSU has a lead called something like
"power good" that tests the PSU voltage at start-up and shuts it down if
power isn't good. Still, another PSU to test with would be the next step
IMHO.

Maybe someone has a better memory than me!

On Jun 21, 7:37 pm, "Matty Anderson" <matty...@hotmail.com> wrote:
> Yesterday I assembled a new system:
> Biostar NF4U AM2G mobo
> Sapphire X1950XT Pro PCI-E video card
> AMD 400+ X2 cpu
> Apevia 500W PSU
> 2 x 1Gb Wintec AmpX 6400 DDR2 ram
> Seagate 400Gb SATA hd
> Seagate 120 IDE hd
> 2 Lite-On DVD burners
>
> That's it, nothing too fancy. When I first powered on, it posted, and I
> went into BIOS to change boot order to boot from CD. Then I powered down,
> and left it overnight. Today when I pressed the power button, no post.
> WTF? All that happens is there is power for a split second, just enough for
> the fans to spin and for the keyboard LED's to flicker for a moment. Then
> nothing, except the power light remains on on the case. If I hold power
> button down for 5 sec, power led shuts off, and when I press power again,
> same thing.
>
> I have just taken everything out of the case and reseated the CPU, RAM,
> video card... no change. I have never experienced this before. Any ideas?
> I'm racking my brain, but there are so few symptoms I can't even make a
> reasonable diagnosis. Unfortunately I don't have a spare PSU to try. Could
> it be the PSU? mobo? I can't think what else could be the culprit.
>
> Thanks for your advice,
> Matt

is the Electricity stable, if not u can try using a AVR 500watt if
that's ok try another psu or reseat the cpu,RAM once more and
disconnect the HD Ribbon cable and leave it for a 5 to 10 Mins also
reset the ATX power from he mb..

In article <5e0hjdF35fbv3U1@mid.individual.net>, mattya25
@hotmail.com says...
> That minimum setup is exactly what I've got right now (with the CPU, too).
> Yes, the CPU fan does spin. There are 6 fans: 2 in the PSU, CPU, case, and
> northbridge, and they all spin for just a second, and then slow down to a
> stop. The obvious symptom is that power is only staying on for a split
> second, then quitting. I'm guessing it sounds like it starts with the PSU.
>
>

You said you had been fiddling with the bios. Have you
tried resetting the CMOS? If, yes and it didn't help, next
thing I'd try is a power supply.

Bill
--
Gmail and Google Groups. This century's answer to AOL and
WebTV.

Try the other suggestions in this group, as they are good ones.
Also, check that the CPU heatsink and fan haven't come loose from the CPU
chip. That would cause this symptom.
Good luck
Jack R

"Matty Anderson" <mattya25@hotmail.com> wrote in message
news:5e0cslF36mjr5U1@mid.individual.net...
> Yesterday I assembled a new system:
> Biostar NF4U AM2G mobo
> Sapphire X1950XT Pro PCI-E video card
> AMD 400+ X2 cpu
> Apevia 500W PSU
> 2 x 1Gb Wintec AmpX 6400 DDR2 ram
> Seagate 400Gb SATA hd
> Seagate 120 IDE hd
> 2 Lite-On DVD burners
>
> That's it, nothing too fancy. When I first powered on, it posted, and I
> went into BIOS to change boot order to boot from CD. Then I powered down,
> and left it overnight. Today when I pressed the power button, no post.
> WTF? All that happens is there is power for a split second, just enough
> for the fans to spin and for the keyboard LED's to flicker for a moment.
> Then nothing, except the power light remains on on the case. If I hold
> power button down for 5 sec, power led shuts off, and when I press power
> again, same thing.
>
> I have just taken everything out of the case and reseated the CPU, RAM,
> video card... no change. I have never experienced this before. Any
> ideas? I'm racking my brain, but there are so few symptoms I can't even
> make a reasonable diagnosis. Unfortunately I don't have a spare PSU to
> try. Could it be the PSU? mobo? I can't think what else could be the
> culprit.
>
> Thanks for your advice,
> Matt
>

On Jun 21, 5:37 pm, "Matty Anderson" <matty...@hotmail.com> wrote:
> Yesterday I assembled a new system:
> Biostar NF4U AM2G mobo
> Sapphire X1950XT Pro PCI-E video card
> AMD 400+ X2 cpu
> Apevia 500W PSU
> 2 x 1Gb Wintec AmpX 6400 DDR2 ram
> Seagate 400Gb SATA hd
> Seagate 120 IDE hd
> 2 Lite-On DVD burners
>
> That's it, nothing too fancy. When I first powered on, it posted, and I
> went into BIOS to change boot order to boot from CD. Then I powered down,
> and left it overnight. Today when I pressed the power button, no post.
> WTF? All that happens is there is power for a split second, just enough for
> the fans to spin and for the keyboard LED's to flicker for a moment. Then
> nothing, except the power light remains on on the case. If I hold power
> button down for 5 sec, power led shuts off, and when I press power again,
> same thing.
>
> I have just taken everything out of the case and reseated the CPU, RAM,
> video card... no change. I have never experienced this before. Any ideas?
> I'm racking my brain, but there are so few symptoms I can't even make a
> reasonable diagnosis. Unfortunately I don't have a spare PSU to try. Could
> it be the PSU? mobo? I can't think what else could be the culprit.
>
> Thanks for your advice,
> Matt

It doesn't sound like you did enough changing of the bios to make a
difference but I would find the motherboard book and look for a bios
reset feature and try that. I would also remove everything that isn't
needed to fire it up leaving only one of the HDD, one stick of memory,
video card, one dvd drive. If it doesn't post then try the other stick
of memory by itself ( you're trying to eliminate the possibility of a
bad stick of memory). Also try reseating the motherboard power
connector (the 20 or 24 pin connector). If that doesn't uncover any
more clues, take it to a shop that can test your PSU. They may do it
for free if they think you'll buy a part from them. Good luck.

Jeff