My fn11 & fn12 keys stopped working in the last 1-2 weeks (screen brightness), but the other function (fn) keys work.
After reviewing this forum, I tried the following, but it didn't fix it:
Laptop: Dell Inspiron 5558.
Os: Windows 10.
Try it with or without the FN key, just the F key alone. The toggle might have changed back to original function. One function is the F1-F12 key alone and the other is pressing the FN key +the F1-12 key at the same time.
Thank you for your message. Did this issue start after any Windows or driver updates?
Try the Fn key behavior by press Fn+Esc to toggle to multimedia & function & check if the issue persists & check if the keys are working.
For my reference, please click on the message tab next to your avatar– click “New Message” & search for my Dell username (Dell-Sreejith R) & send a private message with the service tag, registered name & email address.