Help needed: PC powers off immediately, P4P800-VM

[Tapio Kohonen]

Hi

I have a new ASUS P4P800-VM and P4 2.8C installed in a new case.
Video card and RAM also installed.
No hard drive or CD connected.
Also, only power on and speaker leads are connected to the mainboard.

Problem: When I switch power on, fans start spinning, but PC powers off
immediately.

No beeps.
Same behaviour, if I remove Video card or RAM.
I also tried so that main board was not installed in the case, to avoid
possible short circuit.
I have tried also with another PSU.
In every case same happens, fans start but PC shuts down.
I have also reinstalled the CPU.
I have also cleared the mainboard CMOS.

What could be wrong? Bad CPU or bad mainboard?
Any way to know without buying second item of both...?

Thanks for any suggestions.

Tapio

 

[TK]

Hi

I have a new ASUS P4P800-VM and P4 2.8C installed in a new case.
Video card and RAM also installed.
No hard drive or CD connected.
Also, only power on and speaker leads are connected to the mainboard.

Problem: When I switch power on, fans start spinning, but PC powers off
immediately.

No beeps.
Same behaviour, if I remove Video card or RAM.
I also tried so that main board was not installed in the case, to avoid
possible short circuit.
I have tried also with another PSU.
In every case same happens, fans start but PC shuts down.
I have also reinstalled the CPU.
I have also cleared the mainboard CMOS.

What could be wrong? Bad CPU or bad mainboard?
Any way to know without buying second item of both...?

Thanks for any suggestions.

Tapio

Additional info: If I remove CPU and CPU fan, again video card fan starts
when I put power on, then PC powers off immediately.
Well, maybe this does not mean anything, or could the CPU be bad?
Could boxed Intel P4 really be dead on arrival?

Tapio