Dell Latitude Power up problem

I have a Dell Latitude laptop and now whenever i try to turn it on before it gets to the desktop screen it beeps and turns off... I have tried removing the battery and trying to boot it on just ac but same thing happpens, any ideas?

It was working fine up until a couple of days ago.. this started happening very Suddenly.

 

Would anyone have any ideas what the problem could be? ... Please... Thank you.

 

My first guess would be a protection type of thing, maybe a bad cooling fan, i would try removing one stick of ram [if it has two] and try booting with one, then if nothing try the other stick by its lonesome. ed

 

Thanks for replying.... i just tried turning it on again and the fan dosen't come on at all... that must be it!...

Now i just have to get that fixed