My Function keys are messed up. Volume & Brightness keys don't work!

"If unchecking Function keys nor SMC and PRAM reset don't work, it can be a Key-remapping issue related with a hardware security mechanism against malware (as explained in the last post in https://discussions.apple.com/thread/654...). Apple uses in store a non-accesible software tool. For me, the solution was just installing and opening this program: https://github.com/tekezo/Karabiner-Elem....

Solution taken from https://apple.stackexchange.com/question...."

"The trackpad was probably damaged by a bulging battery pushing and breaking the trackpad due to poor design. I’ve experienced this on two MBP and am pretty fed up with it since the battery and whatever damage it makes isn’t covered by warranty and Apple doesn’t take responsibility for faulty design.

Two days ago after connecting to my Apple TB monitor at home with and Apple USB keyboard (and BT trackpad) connected I experienced the same malfunction of the volume keys as stated above in one of our families MBA and I’m pretty sure it’s due to really unstable OSX nowadays. Has it really been that long since the late S.J. went 6ft under?

Hardware and software that used to be “it just works” -which lead me to replace my families entire eco system several years ago and contiously adding new Apple products- seem to be dropping like flies and is nowhere near anymore.

Volume /function button problem:

[Fn] button working since double press opens the “dictation” pop-up and all F1-12 work correct wile the default functions like brightness and volume are gone. I’ve tried activating and deactivating “Use F1, F2…” and also disabled “Show desktop/dashboard” for [F11] and [F12] while the latter two were never activated by myself. On the external USB Apple keyboard everything works correct.

So, no keyboard hardware failure but instead I’m confident a full clean install will do the job like in the days of crappy Windows unless someone can come up with a solution to restore functionality which wasn’t altered by myself…"

"I went into system preferences, keyboard, and saw that somehow “use F1 F2 keys as standard function keys’

once i unclicked that it all worked fine"

"Go to Settings>Keyboard>Keyboard>Deselect the lower of the two boxes, as seen in the attached picture.

Enjoy!"