Brightness / Sound Keys not working

[igottm]

I was messing around some files and deleted a few and i just noticed that now f1, f2 which turns brightness up and down dosen't work aswell as f10 f11 and f12.

when i press the sound shortcuts nothing happened. however i am able to change the sound by clicking on sys pref > sound.

any ideas?

 

[GGJstudios]

System Preferences > Keyboard > Keyboard > Use all F1, F2, etc. keys as standard function keys (uncheck)

 

[igottm]

System Preferences > Keyboard > Keyboard > Use all F1, F2, etc. keys as standard function keys (uncheck)

Yes this is unchecked already still having same issue.

i believe i must of deleted an important file from the driver or something. is there any way to redownload it?

 

[b11r]

i have the same problem..

i have done this trick too
System Preferences > Keyboard > Keyboard > Use all F1, F2, etc. keys as standard function keys (uncheck)

but the problem still there..

 

[GGJstudios]

i have the same problem..

i have done this trick too
System Preferences > Keyboard > Keyboard > Use all F1, F2, etc. keys as standard function keys (uncheck)

but the problem still there..

Did you try restarting your computer?

 

[Brian Y]

PRAM Reset. Turn off computer, hold down the CMD+ALT+P+R keys, then turn it on. Release the keys after the second chime.

 

[deelah]

Just Force Start your computer...

...by holding the Start key for 3 seconds. Then restart your computer. The brightness and volume keys should just reset themselves.