Cant Render - Black Renders
 

I have a model of a Revolver that I am unable to render. Whenever I attempt to render it just comes up as a black render screen, nothing is visible. Its almost as if it ignored it altogether. I dont know what to do. If anyone has any ideas I would be very appreciative, or if your one of the more experienced members with some extra time I can also email the model to you and find out whats wrong. Ive never encountered this problem before and it is confusing me very much and frustrating me. Please help!

check your messages ;)

try checking if you have ticked "enable default light" in render settings