New pc - power won't stay on.

algae wrote:
> HI all,
> Just put togther a new pc built on a P5K mb, 6600 quad core cpu. Got
> everything in place, press the power button and the CPU fan starts,
> but quickly shuts off -- nothing else happens. No HD whirl, nothing.
> There is a green light on the motherboard when I plug it in though.
> This also may help...I swapped out the 450w power supply in the case
> (Antec Sonata II) for a new Silverstone 600w. When I disconnected the
> old one, I noticed that a connector that ran from the power supply to
> the mb..it's labeled "pwr_fan" does not have the same connector built
> into the new power supply. This may be the problem but I'm not sure
> what to do about it if the new power supply just doesn't have that
> connector.
> Thanks for any help.
> Gary

All you need is the heatsink fan plugged into the correct header. The
pwr_fan is for those PSUs that have a connector so you can monitor the
PSU fan (don't know why anyone would want to, though). The BIOS doesn't
care if it's there, or not. Just the CPU fan connector.

Do you have the 4x4 pin connector plugged into the 4 pin socket near the
CPU?

When it comes on momentarily and goes out, have you waited about 10-15
seconds for it to come back and boot? My P5B does this and it seems
common on Asus MBs. It comes on momentarily to check settings, then
shuts off. If all is OK, it will come back on in about 10-15 seconds
and boot from there.
 >> Stay informed about: New pc - power won't stay on. 

algae wrote:
> On Feb 9, 7:51 pm, "RobV" <r....TakeThisOut@nowhere.invalid> wrote:
>> algae wrote:
>>> HI all,
>>> Just put togther a new pc built on a P5K mb, 6600 quad core cpu. Got
>>> everything in place, press the power button and the CPU fan starts,
>>> but quickly shuts off -- nothing else happens. No HD whirl, nothing.
>>> There is a green light on the motherboard when I plug it in though.
>>> This also may help...I swapped out the 450w power supply in the case
>>> (Antec Sonata II) for a new Silverstone 600w. When I disconnected
>>> the old one, I noticed that a connector that ran from the power
>>> supply to the mb..it's labeled "pwr_fan" does not have the same
>>> connector built into the new power supply. This may be the problem
>>> but I'm not sure what to do about it if the new power supply just
>>> doesn't have that connector.
>>> Thanks for any help.
>>> Gary
>>
>> All you need is the heatsink fan plugged into the correct header.
>> The pwr_fan is for those PSUs that have a connector so you can
>> monitor the PSU fan (don't know why anyone would want to, though).
>> The BIOS doesn't care if it's there, or not. Just the CPU fan
>> connector.
>>
>> Do you have the 4x4 pin connector plugged into the 4 pin socket near
>> the CPU?
>>
>> When it comes on momentarily and goes out, have you waited about
>> 10-15 seconds for it to come back and boot? My P5B does this and it
>> seems common on Asus MBs. It comes on momentarily to check
>> settings, then shuts off. If all is OK, it will come back on in
>> about 10-15 seconds and boot from there.
>
> Oop...I forgot the 4 pin connector:(
> Thanks!

You're welcome. Don't worry: it's a common mistake (one I've made
myself). The CPU really appreciates the fresh voltage when it's plugged
in.
 >> Stay informed about: New pc - power won't stay on. 

On Sat, 9 Feb 2008 19:51:44 -0800 (PST), algae <garyboyce.DeleteThis@gmail.com>
wrote:

>On Feb 9, 7:51 pm, "RobV" <r....DeleteThis@nowhere.invalid> wrote:
>> algae wrote:
>> > HI all,
>> > Just put togther a new pc built on a P5K mb, 6600 quad core cpu. Got
>> > everything in place, press the power button and the CPU fan starts,
>> > but quickly shuts off -- nothing else happens. No HD whirl, nothing.
>> > There is a green light on the motherboard when I plug it in though.
>> > This also may help...I swapped out the 450w power supply in the case
>> > (Antec Sonata II) for a new Silverstone 600w. When I disconnected the
>> > old one, I noticed that a connector that ran from the power supply to
>> > the mb..it's labeled "pwr_fan" does not have the same connector built
>> > into the new power supply. This may be the problem but I'm not sure
>> > what to do about it if the new power supply just doesn't have that
>> > connector.
>> > Thanks for any help.
>> > Gary
>>
>> All you need is the heatsink fan plugged into the correct header. The
>> pwr_fan is for those PSUs that have a connector so you can monitor the
>> PSU fan (don't know why anyone would want to, though). The BIOS doesn't
>> care if it's there, or not. Just the CPU fan connector.
>>
>> Do you have the 4x4 pin connector plugged into the 4 pin socket near the
>> CPU?
>>
>> When it comes on momentarily and goes out, have you waited about 10-15
>> seconds for it to come back and boot? My P5B does this and it seems
>> common on Asus MBs. It comes on momentarily to check settings, then
>> shuts off. If all is OK, it will come back on in about 10-15 seconds
>> and boot from there.
>
>Oop...I forgot the 4 pin connector:(
>Thanks!


Umm..... In building PCs the following rules are very helpful:-

1. "Look before you leap" == thoroughly read ALL relevant
documentation before assembling and <<certainly before applying
any power.>>

2. "More haste--less speed" == banish ALL distractions when building a

PC and defer the activity if:-
(a) you do not have the proper tools
(b) you are tired, irritable, bad-tempered or short of time
(c) you are missing some vital information... remember that Google
is your friend if the information is not in the obvious places
including manufacturer web-sites.

3." Keep it simple, stupid" Build initially with the minimum number
of peripheral devices essential to get the computer to run.

John Lewis
 >> Stay informed about: New pc - power won't stay on. 

Also, having a too small a heat sink on a new computer CPU will do the same
thing. I managed to get to BIOS and noticed the temp. before it shut down.
Had to buy a larger heat sink.

Joltjocky

"John Lewis" <john.dsl RemoveThis @verizon.net> wrote in message
news:47ae8399.33661256@news.verizon.net...
> On Sat, 9 Feb 2008 19:51:44 -0800 (PST), algae <garyboyce RemoveThis @gmail.com>
> wrote:
>
>>On Feb 9, 7:51 pm, "RobV" <r... RemoveThis @nowhere.invalid> wrote:
>>> algae wrote:
>>> > HI all,
>>> > Just put togther a new pc built on a P5K mb, 6600 quad core cpu. Got
>>> > everything in place, press the power button and the CPU fan starts,
>>> > but quickly shuts off -- nothing else happens. No HD whirl, nothing.
>>> > There is a green light on the motherboard when I plug it in though.
>>> > This also may help...I swapped out the 450w power supply in the case
>>> > (Antec Sonata II) for a new Silverstone 600w. When I disconnected the
>>> > old one, I noticed that a connector that ran from the power supply to
>>> > the mb..it's labeled "pwr_fan" does not have the same connector built
>>> > into the new power supply. This may be the problem but I'm not sure
>>> > what to do about it if the new power supply just doesn't have that
>>> > connector.
>>> > Thanks for any help.
>>> > Gary
>>>
>>> All you need is the heatsink fan plugged into the correct header. The
>>> pwr_fan is for those PSUs that have a connector so you can monitor the
>>> PSU fan (don't know why anyone would want to, though). The BIOS doesn't
>>> care if it's there, or not. Just the CPU fan connector.
>>>
>>> Do you have the 4x4 pin connector plugged into the 4 pin socket near the
>>> CPU?
>>>
>>> When it comes on momentarily and goes out, have you waited about 10-15
>>> seconds for it to come back and boot? My P5B does this and it seems
>>> common on Asus MBs. It comes on momentarily to check settings, then
>>> shuts off. If all is OK, it will come back on in about 10-15 seconds
>>> and boot from there.
>>
>>Oop...I forgot the 4 pin connector:(
>>Thanks!
>
>
> Umm..... In building PCs the following rules are very helpful:-
>
> 1. "Look before you leap" == thoroughly read ALL relevant
> documentation before assembling and <<certainly before applying
> any power.>>
>
> 2. "More haste--less speed" == banish ALL distractions when building a
>
> PC and defer the activity if:-
> (a) you do not have the proper tools
> (b) you are tired, irritable, bad-tempered or short of time
> (c) you are missing some vital information... remember that Google
> is your friend if the information is not in the obvious places
> including manufacturer web-sites.
>
> 3." Keep it simple, stupid" Build initially with the minimum number
> of peripheral devices essential to get the computer to run.
>
> John Lewis
 >> Stay informed about: New pc - power won't stay on. 

On Feb 16, 3:37 pm, "Donald Witmer" <don.wit....TakeThisOut@comcast.net> wrote:
> Also, having a too small a heat sink on a new computer CPU will do the same
> thing. I managed to get to BIOS and noticed the temp. before it shut down.
> Had to buy a larger heat sink.
>
> Joltjocky
>
> "John Lewis" <john.....TakeThisOut@verizon.net> wrote in message
>
> news:47ae8399.33661256@news.verizon.net...
>
>
>
> > On Sat, 9 Feb 2008 19:51:44 -0800 (PST), algae <garybo....TakeThisOut@gmail.com>
> > wrote:
>
> >>On Feb 9, 7:51 pm, "RobV" <r....TakeThisOut@nowhere.invalid> wrote:
> >>> algae wrote:
> >>> > HI all,
> >>> > Just put togther a new pc built on aP5Kmb, 6600 quad core cpu. Got
> >>> > everything in place, press the power button and the CPU fan starts,
> >>> > but quickly shuts off -- nothing else happens. No HD whirl, nothing.
> >>> > There is a green light on the motherboard when I plug it in though.
> >>> > This also may help...I swapped out the 450w power supply in the case
> >>> > (Antec Sonata II) for a new Silverstone 600w. When I disconnected the
> >>> > old one, I noticed that a connector that ran from the power supply to
> >>> > the mb..it's labeled "pwr_fan" does not have the same connector built
> >>> > into the new power supply. This may be the problem but I'm not sure
> >>> > what to do about it if the new power supply just doesn't have that
> >>> > connector.
> >>> > Thanks for any help.
> >>> > Gary
>
> >>> All you need is the heatsink fan plugged into the correct header.  The
> >>> pwr_fan is for those PSUs that have a connector so you can monitor the
> >>> PSU fan (don't know why anyone would want to, though).  The BIOS doesn't
> >>> care if it's there, or not.  Just the CPU fan connector.
>
> >>> Do you have the 4x4 pin connector plugged into the 4 pin socket near the
> >>> CPU?
>
> >>> When it comes on momentarily and goes out, have you waited about 10-15
> >>> seconds for it to come back and boot?  My P5B does this and it seems
> >>> common onAsusMBs.  It comes on momentarily to check settings, then
> >>> shuts off.  If all is OK, it will come back on in about 10-15 seconds
> >>> and boot from there.
>
> >>Oop...I forgot the 4 pin connector:(
> >>Thanks!
>
> > Umm.....  In building PCs the following rules are very helpful:-
>
> > 1. "Look before you leap"  == thoroughly read ALL relevant
> >    documentation before assembling and <<certainly before applying
> >    any power.>>
>
> > 2. "More haste--less speed" == banish ALL distractions when building a
>
> >    PC and defer the activity if:-
> >   (a) you do not have the proper tools
> >   (b) you are tired, irritable, bad-tempered or short of time
> >   (c) you are missing some vital information... remember that Google
> >        is your friend if the information is not in the obvious places
> >        including manufacturer web-sites.
>
> > 3."  Keep it simple, stupid" Build initially with the minimum number
> >       of peripheral devices essential to get the computer to run.
>
> > John Lewis- Hide quoted text -
>
> - Show quoted text -

I am having very similar problems to what algae had, turn power on
computer fans go for about 10 seconds then everything switches off,
then moments later it tries again and same thing happens. Also note
no screen is reached on the computer or any beeps heard. I too have
the asus p5k-e mb with E8400. Have tried all my other components ram,
graphics, power supply on another computer and they work. Tried a
e6750 in my motherboard and it had same problems, so don't think its
the CPU. Pretty sure all the plugs are in properly too.

Anyway Ideas I am sending the mb back as im pretty sure theres a fault
here
 >> Stay informed about: New pc - power won't stay on.