Macbook Pro screen and keyboard lights problems

Hi there, I have a macbook pro 15'' late 2011. Lately I realised that the screen does not dim when in a dark room and the keyboard lights do not work either. The keyboard keys work for dimming and lighting the screen, but it does not happen automatically. As for the keyboard lights, pressing the F5 and F6 buttons brings up the image of keyboard lights and they seem to be increasing and decreasing, but in fact nothing happens and the keyboard remains without any lights.
Any suggestions?
Thanks!

You should also ask this in the MacBook Pro forum. This is the forum for the 13” white and black plastic MacBooks without lighted keyboards that were discontinued in 2010. You should also post this question there to increase your chances of getting an answer.
https://discussions.apple.com/community/notebooks/macbook_pro

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