Function Keys Not Working Regardless of "Use all f1.." Being Checked or Unchecked

Hi
If someone could help me I'd be really appreciative. I recently got some parts repaired by apple, the trackpad was replaced and a small wire replaced too which was to do with the keyboard connection. Since getting my macbook air back everything works fine except my function keys don't work. When the "Use F1, F2 etc ... as standard function keys" is checked the only function keys that work are f11 and f12 as they should as these are the only shortcuts set up to show desktop and show dashboard, respectively. However when I come to uncheck "Use F1, F2 etc ... as standard function keys" noting appears to happen the f11 and f12 act no differently as when it was checked and the rest of the function keys remain unresponsive.
Trying to press the keys with the Fn key pressed also makes no difference.
Thanks for reading
Oli

It looks like a faulty repair. You should take it back to Apple and have it redone.

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I am an HP employee.
Make it easier for other people to find solutions, by marking my answer “Accept as Solution” if it solves your problem.

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