Need Help: New Parts But Comp Boots For 25 Secs Max

Hi,
I recently purchased the following:
ECS 848P-A7 LGA 775 MOTHERBOARD
INTEL P4 PROCESSOR 506,LGA 775
1 GB DDR 3200 RAM
SEAGATE HARD DRIVE
EMPREX DVD WRITER 16X
450 WATTS POWER SUPPLY UNIT

THE PROBLEM:
I have connected evrything correctly exactly like the rest of the PCs I have assembled,but this machine I have some trouble.

The motherboard boots for abt 10 to 25 seconds and dies.

I have exchanged the motherboard and proccessor 3 times already and think it is not the problem.

Please advice....

Thnaks,

ASIANHAWK

 

Make sure you have the CPU HSF mounted securely and have the fan plugged in.
Also make sure your Video Card is secure in it's slot

 

CHECKED: But the same situation...

 

What do you mean by "boots for 10 - 25 seconds"?
Do you get any display on the screen? Do you get any other activities in these 25 seconds? After 25 seconds what happens? Any fans spinning while and/or after?

 

What brand power supply have you got. Could be the problem if its a poor quality unit.

 

LOLOLOLOL -

The Motherboard Boots ........

According to Hawk (the link I mean....) his motherboard has already started the Christmas shopping......