My dell latitude e6400 cant turn on

[addictedalpha]

I opened my laptop then i removed my ram and returned them... From that moment when i turn my laptop on it runs but does not display and after few seconds it turns off..... And the caps lock Led light blinks... Also when i tried turning it on it just runs and then off without even displaying anything..... need for a help please

 

[Snipergod87]

Did you leave any RAM installed?