Hard drive is not recognized in laptop

I recently bought a laptop last 2010 and it is still covered by a warranty. However, whenever I turn it on, it does not show my hard drive. Even when I continue with the start up, it would pose a question asking me whether my problem is with my hard drive or from something else. I do not know how I would go about this problem unless someone helps me. So I am appealing to you. Please help.
