I have been noticing that on my MBA the entire backlite behind the keys will light up, but not the letters on the individual keys themselves. I have the a1370 11" mid 2011, and noticed from other online forums/videos my F5 and F6 keys do not have the ability to adjust any brightness. The only brightness i have are on the F1 and F2. Is this due to the model, and not a feature it comes with?
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First you should make sure your systems firmware is up to date. Follow this Apple T/N: About EFI and SMC firmware updates for Intel-based Mac computers make sure your at the level listed or newer.
Next, try resetting the SMC follow this Apple T/N: Reset the System Management Controller (SMC) on your Mac as some settings are held in the nonvolatile memory of the system.
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