My computer wont start!

I have HP Pavilion d4180.
Recently i posted here the same topic and was given the advise to take out the grafic card and see if the PC can start. I tried that and it didnt work. The power button enables a bright blue light when the PC is turned on,now it is weak and dies quickly out when i try to power it on.
My PC has external video only meaning no onboard grafic.
Can the d4180 start without the grafic card or is something else broken ie the CPU and soon on.

Motherboard specification;
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00379616&tmp_task=prodinfoCategory&lc=en&dlc=sv&cc=se&lang=sv&product=1124197