Sound and Brightness Keys are not working

Joined
Aug 24, 2012
Messages
5
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Location
Poole, UK
Your Mac's Specs
Macbook
Hello,

The sound and the brightness keys on my MacBook are not working.

When I check the box in System preferences > Keyboard and Mouse > "Use all F1 F2...", it works fins as "F" button but if I uncheck, these are not working.

Wondering whats wrong !. Could you please advise?

Many thanks,
SG
 

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