I have a HP 430 with Windows Home Basic 32 Bit Operating System. My Fn + F2 , F3 , F4 keys don't work. What can I do now? I can only increase or decrease brightness of screen.
In order to solve this problem, you have to make sure that the keys are physically working. Also, you can try visiting the following official web page in order to download and install the appropriate driver for the Fn key.