when you say they aren't working, what are you expecting to happen?
With all laptops the F or Function keys can serve 2 purposes, the little icons on them can be used to put your laptop in airplane mode, disable the trackpad or turn the volume up and down, or they can be switched to work as windos functions, IE open the help menu when you press f1 for example.
this is usually done by pressing and holding the Fn button while you press the function button on the top row. or there is usually a bios option to switch the mode in which the function keys operate.