Cpu or Mobo problem(blank screen)

[Csspecs]

I built a computer about a week ago and it was the first one that I have worked on. It was work untill last night, when I shut down the computer last night it took about one and a half mins. And today it would not start up, all I got was a blank screen, so I swapped out the video card and that did nothing so I took out the hard drive a put a old hard drive in that had win98 (the new one has win98 too) that did nothing so I swapped out the ide cable still nothing. Now I am down to the last two parts the cpu and the mobo
this is the Cpu AMD Athlon 1.33 GHz, 266MHz FSB, 256K Cache
and the mobo is a ECS "K7VTA3 V6.0" VIA KT333 . I did not use the thermal paste(I didn't know about that). The cpu had 4 1/4 inch rubber discs on it.

 

[vegasgmc]

Those older Athlons run VERY hot and if you didnt use thermal paste the processor most likely burned out. It could have damaged the motherboard too. You could also have a bad power supply.

 

[Csspecs]

ok thank you.