fans turn on then off

Hello,

I built the PC myself, yet it does not boot. When I press the Power
On switch, the fans turn on for about a second, then they turn off
automatically. I checked the standoffs. I remove the motherboard
from the case. I disconnected all drives, and the video card. I
removed the CPU then put it back. Yet the behavior is still the
same. What could it be?

Thanks,
T.I

"titani" <> wrote in message
news:375c22d6-c9af-4b31-b599-...
> Hello,
>
> I built the PC myself, yet it does not boot. When I press the Power
> On switch, the fans turn on for about a second, then they turn off
> automatically. I checked the standoffs. I remove the motherboard
> from the case. I disconnected all drives, and the video card. I
> removed the CPU then put it back. Yet the behavior is still the
> same. What could it be?
>
> Thanks,
> T.I

You have put some thermal grease or similar in between the CPU and heatsink,
haven't you ?

On Jul 25, 2:46*am, "Mick Sitton" <no...@toytown.com> wrote:
> "titani" <tit...@airmail.net> wrote in message
>
> news:375c22d6-c9af-4b31-b599-...
>
> > Hello,
>
> > I built the PC myself, yet it does not boot. *When IpressthePower
> > Onswitch, thefansturnon for about a second, then theyturnoff
> > automatically. *I checked the standoffs. *I remove the motherboard
> > from the case. *I disconnected all drives, and the video card. *I
> > removed the CPU then put it back. *Yet the behavior is still the
> > same. *What could it be?
>
> > Thanks,
> > T.I
>
> You have put some thermal grease or similar in between the CPU and heatsink,
> haven't you ?

There is thermal grease between the CPU and the heatsink. And, the
fans are turning off after only one second of pressing the power on
switch. Surely the CPU does not overheat in one second.

On Jul 25, 2:47*am, Andy Burns <usenet.april2...@adslpipe.co.uk>
wrote:
> On 25/07/2008 06:10, titani wrote:
>
> > I built the PC myself, yet it does not boot. *When IpressthePower
> > Onswitch, thefansturnon for about a second, then theyturnoff
> > automatically. *I checked the standoffs. *I remove the motherboard
> > from the case. *I disconnected all drives, and the video card. *I
> > removed the CPU then put it back. *Yet the behavior is still the
> > same. *What could it be?
>
> Presumably nothing else turns back on at all?
>
> I had a P5E WS-PRO which developed the same fault a couple of days after
> installation, it had to be RMA'ed.

My motherboard is the P5E-PRO. Which motherboard did you get instead?

The message
<375c22d6-c9af-4b31-b599->
from titani <> contains these words:

> Hello,

> I built the PC myself, yet it does not boot. When I press the Power
> On switch, the fans turn on for about a second, then they turn off
> automatically. I checked the standoffs. I remove the motherboard
> from the case. I disconnected all drives, and the video card. I
> removed the CPU then put it back. Yet the behavior is still the
> same. What could it be?


Check if your memory - RAM - is seated properly .

--
Derek

"Some days you're the pigeon,some days you're the statue"

Visit http://www.badphorm.co.uk/page.php?2 to see what some British
ISPs are doing to your online privacy.

titani wrote:
> Hello,
>
> I built the PC myself, yet it does not boot. When I press the Power
> On switch, the fans turn on for about a second, then they turn off
> automatically. I checked the standoffs. I remove the motherboard
> from the case. I disconnected all drives, and the video card. I
> removed the CPU then put it back. Yet the behavior is still the
> same. What could it be?
>
> Thanks,
> T.I

A little more information, such as MB maker and model, memory, CPU, etc.
would help.

After the fans stop turning, wait about 30 seconds. Do they come back
on?

And, when you say the fans shut off, does that mean the computer shuts
down as well?

about your computer.

titani <> wrote in news:375c22d6-c9af-4b31-b599-
:

> Hello,
>
> I built the PC myself, yet it does not boot. When I press the Power
> On switch, the fans turn on for about a second, then they turn off
> automatically. I checked the standoffs. I remove the motherboard
> from the case. I disconnected all drives, and the video card. I
> removed the CPU then put it back. Yet the behavior is still the
> same. What could it be?
>
> Thanks,
> T.I
>

A bad fan can even cause that as I've seen it happen. Could be a bad fan on
the CPU.

In article <1jyik.135588$gc5.33197@pd7urf2no>, lid
says...
> titani <> wrote in news:375c22d6-c9af-4b31-b599-
> :
>
> > Hello,
> >
> > I built the PC myself, yet it does not boot. When I press the Power
> > On switch, the fans turn on for about a second, then they turn off
> > automatically. I checked the standoffs. I remove the motherboard
> > from the case. I disconnected all drives, and the video card. I
> > removed the CPU then put it back. Yet the behavior is still the
> > same. What could it be?
> >
> > Thanks,
> > T.I
> >
>
> A bad fan can even cause that as I've seen it happen. Could be a bad fan on
> the CPU.
>
I worked on one machine where a bad CD drive was causing the same
problem. Process of elimination.

"titani" <> wrote in message
news:375c22d6-c9af-4b31-b599-...
> Hello,
>
> I built the PC myself, yet it does not boot. When I press the Power
> On switch, the fans turn on for about a second, then they turn off
> automatically. I checked the standoffs. I remove the motherboard
> from the case. I disconnected all drives, and the video card. I
> removed the CPU then put it back. Yet the behavior is still the
> same. What could it be?
>
> Thanks,
> T.I

Classic symptoms of a bad PSU.


Ed