If the function keys are not working, the problem may be you have a function lock or F-Lock key that needs to be toggled. The F-Lock key is used to turn on or off the F keys ( F1 through F12 ) or secondary functions of the F keys. Some keyboards may label the F-Lock key as the Fn key.
How do I lock and unlock the Fn key?
1] Lock and Unlock Function (Fn) key on Keyboard If the function lock key is present on your keyboard, simply press the key and the Fn key to lock Fn keys. To unlock Fn lock, repeat the action again. The Fn lock key is represented by a lock symbol and located under the Esc (Escape) key on most standard keyboards.
How do I activate the Fn key?
To enable FN Lock on the All in One Media Keyboard, press the FN key, and the Caps Lock key at the same time. To disable FN Lock, press the FN key, and the Caps Lock key at the same time again.
