rendering problem - it does not render

Hello.
When I press render, nothing happens.


Ididnt change any settings, I have camera, light … It doesnt make sense. I found nothing on the internet.
My notebook seems to do nothing, CPU is on 1,17GHz.
Pls, is here anybody who knows where is the problem?
Thx

(I have a new laptop with nVidia geforce 740M, intel core i5, 6GB memory, win 8)

Would be good if you upload your blend. Then we could investigate the issue. Too many things may go wrong.

with the given information all I can think of is to use this node…



please upload your file or show other screens that might give information on your current setting.

Thank you.
I solved it. The picture was append and it did some trouble with rendering. When I append every piece of it alone, it works.