Lenovo c200 hard drive problem?

Hello n thanks 4 luking,my frnd`s got a lenovo c200/3000 laptop which he bought from usa,it worked f9 for first 3/4 months,then last week he shut it down by its power button while it was on,now when he turns it on then the system doesnt detect any hard drives,does someone has any idea, wht kind of problem it cud b??
Answer
Try loading bios defaults . u should never shut a laptop off with the power button coz theres a possibility of harddrive corruption .