I cant get it to boot

[EvanAdams]

So, I turn on my computer one day and nothing is on the screen, as if I had no computer at all no signal.

So I replace my atx powersuply
no change

so I replace the mobo (P4B533-v to P4G800-v)
no change

so I replace the cpu (1.6A to 3.0 prescot)
no change

what do I do now? I have noting pluged into the mobo but the powersuply, cpu, and ram. Still nothing on the screen via the onboard video.

I am soooo confused. I've built 5 systems but have NEVER had this problem.

 

[EvanAdams]

please dont let it be the memory.. $400 at this point is absurd.

If I have to get memory I'm gona need some sort of sedative.

 

[Yanagi]

are you getting some sort of beep code? or does it just stay blank without any beeping?

 

[EvanAdams]

no no beep a beep would mean it is posting it is not posting

 

[EvanAdams]

ok so if I pull out the ram I get one long and two short beeps.