Asus P4R800VM - CPU Fans Spins 1 Second on Boot, Then Stops

[Al]

I just bought the Asus P4R800VM, installed a new Celeron 2.4 Ghz processor,
attached the CPU heat sink and fan, and then hooked up a Zallman 300w power
supply. All these in a Silverstone case. Nothing else attached. After
pressing the front power button, the CPU and case fan spin for about a
second, and then shut down. Does this sound like a defective motherboard?

 

[Paul]

I just bought the Asus P4R800VM, installed a new Celeron 2.4 Ghz processor,
attached the CPU heat sink and fan, and then hooked up a Zallman 300w power
supply. All these in a Silverstone case. Nothing else attached. After
pressing the front power button, the CPU and case fan spin for about a
second, and then shut down. Does this sound like a defective motherboard?

Is the 2x2 ATX12V power connector installed, as well as the normal
20 pin ATX power connector ? The processor gets its power exclusively
from the 2x2 connector on recent generation boards.

The fan headers are powered through the single +12V wire on the 20 pin
ATX power connector, so the fact that they spin, doesn't prove that
the processor is getting power. You'll have to look to see if the
2x2 connector is plugged in.

If that isn't the problem, I'd next be checking the label on the
Zalman power supply. A rating of 12V @ 15A is a good general purpose
number for a high end processor. A Northwood Celeron will perhaps not
need quite all of that, so a slightly lesser rating might still work.

If your processor is one of those fancy CeleronD processors, well,
good luck The last poster I responded to with a CeleronD has an
overload problem on his PSU, and your 300W is probably no match for
the evil that is CeleronD. They are too new for the full story to
be known - something just isn't right about them.

Paul

 

[Al]

motherboard?

Is the 2x2 ATX12V power connector installed, as well as the normal
20 pin ATX power connector ? The processor gets its power exclusively
from the 2x2 connector on recent generation boards.

The fan headers are powered through the single +12V wire on the 20 pin
ATX power connector, so the fact that they spin, doesn't prove that
the processor is getting power. You'll have to look to see if the
2x2 connector is plugged in.

If that isn't the problem, I'd next be checking the label on the
Zalman power supply. A rating of 12V @ 15A is a good general purpose
number for a high end processor. A Northwood Celeron will perhaps not
need quite all of that, so a slightly lesser rating might still work.

If your processor is one of those fancy CeleronD processors, well,
good luck The last poster I responded to with a CeleronD has an
overload problem on his PSU, and your 300W is probably no match for
the evil that is CeleronD. They are too new for the full story to
be known - something just isn't right about them.

Paul

Thanks very much for the reply. The 2x2 ATX12V connector is definitely
plugged in.
The Celeron is described like this on the invoice:

CPU INTEL CELERON 2.4G 478P RTL

This is the page I ordered it from:

http://www.newegg.com/app/viewProductDesc.asp?description=19-112-176&depa=0

Doesn't look like it is a CeleronD. Here is the power supply:

http://www.newegg.com/app/viewProductDesc.asp?description=17-103-211&depa=0

When I took the CPU cooler off to take a look, the top label on the Celeron
seemed like
it was partially melted. Maybe this is normal. This is my first time
building my own computer,
and it was pretty disappointing when it didn't power up.

 

[Homer]

I did not see if you put in a video card or memory in your message. Reseat
the memory and video card and check the CPU and make sure there are no bent
pins. If you have an old pci video try that to see if it works. Try clearing
the cmos. Unplug the unit and move the cmos jumper and return it to it
correct position.

Homer

 

[Adam S]

Are you sure the CPU fan is plugged into the CPU fan connector. If the
motherboard does not see any power being drawn from the CPU fan power
connector it will assume that the CPU has no fan, and will shut down to
protect itself.

Adam S

 

[Al]

Are you sure the CPU fan is plugged into the CPU fan connector. If the
motherboard does not see any power being drawn from the CPU fan power
connector it will assume that the CPU has no fan, and will shut down to
protect itself.

Adam S

The CPU fan is definitely plugged into the right connector. Hopefully those
kinds of diagnostic checks have kept me from damaging anything so far.

I attached the system speaker to see if there were any codes generated, but
nothing. The CPU fan turns off pretty quickly, probably less than a second.
Someone local suggested a short, but I attached the board very carefully,
and I have checked that nothing is touching something it shouldn't be.

I am starting to think I have a bad mobo / CPU / PSU. Maybe I'll take it in
to someone that knows what they are doing.

 

[Al]

See below for the solution

The CPU fan is definitely plugged into the right connector. Hopefully those
kinds of diagnostic checks have kept me from damaging anything so far.

I attached the system speaker to see if there were any codes generated, but
nothing. The CPU fan turns off pretty quickly, probably less than a second.
Someone local suggested a short, but I attached the board very carefully,
and I have checked that nothing is touching something it shouldn't be.

I am starting to think I have a bad mobo / CPU / PSU. Maybe I'll take it in
to someone that knows what they are doing.

I attached a hard drive to IDE 1, and the thing started up right away. I
feel a little stupid, but thanks for the suggestions.

 

[Paul]

See below for the solution



I attached a hard drive to IDE 1, and the thing started up right away. I
feel a little stupid, but thanks for the suggestions.

That doesn't sound normal. Something else must have changed in your
reassembly of the system. The BIOS would normally wait a period of
time, to determine whether there are any disks connected. It cannot
figure all that out in one second. For example, my board has a 35 second
timeout constant set in the BIOS. A one second shutdown is the kind
of thing that happens if the fan isn't connected or something is
overheating etc.

Paul