So I know this has be discussed but and I've searched it but haven't found any answers to my specific question. Forgive me but I am a new Mac user. My keyboard dims after I don't use the computer for a certain amount of time. I understand this and know its a normal function of the computer. But I have it set to do that after 5 min in my system preferences and my keyboard does it after 3 min everytime. I can not figure out why it keeps doing that. Its that normal? I would assume not. Why would the settings say 5 and the computer do something different. If I change it to 1 min it will do it after 1 min. Change back to 5 min and dims after 3. Ideas?