NO POST, NO SYSTEM BEEPS AFTER INSTALL

Hi All....new to this site and this forum....

I have read through many threads that sound quite similar to my problem and have tried many of the probable resolutions with no luck.

Apologies that i am bringing this to the table again.

I recently started putting together some components into an older system
here are the details:

AOPEN AK75 mainboard (brand new)
AMD Athlon XP2000 CPU (barely used)
512MB DDR266 RAM
MX440 graphics card (GeForce i believe)
120GB 7200 RPM Seagate HDD (Brand new with clean copy XP)

all system components seem to power up no problem however:

No Video - No POST - no system BEEPS at all.

I have tried to remove the ram chip and re-boot and still no system beeps

I have also tried a different graphics card as the mx440 has been known to failure

i have reset CMOS - i think - and even removed the battery for a short period of time

still no luck

I am open to any and all suggestions and your advise is much appreciated.

Thanks