4530 proBook s - cannot use fn controls to adjust the brightness. Also can not see on screen volume meter

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  The brightness of the display can be controlled by the FN + F7 and Fn + F6.
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  Hi redmg,

  The FN keys are controlled by value added and Flash Cards Support utility package. So if you can use t FN keys correctly reinstall these two tools of Toshiba. You can download on the official page of Toshiba:
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  My spec full in the link below.

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  Thank you

  John.

  You mean that you can not use the Fn or Fn + F6, F7 button combination?
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  Also check this doc:
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