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
...
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 25/07/2008 06:10, titani wrote:

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?

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.

On Jul 25, 2:46*am, "Mick Sitton" wrote:
"titani" wrote in message

...

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
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?

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?

Went through the same thing a week ago. Turned out to be a faulty power
supply even though it was new.

Hobo


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

On 25/07/2008 12:30, titani wrote:

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

Another P5E-WS-PRO, this one has been fine.

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.