Late 2012 27-inch iMac brightness drops

[Hexley]

When I try to max out the brightness of my screen it instantly drops notch lower.

http://cdn.cultofmac.com/wp-content/uploads/2012/04/AppleWiredKeyboard_PRINT.jpg


When I try this keyboard command to darken the screen then wake it the gives a fraction of a second of brightness and drops a notch lower.

Any idea on how to fix this?

 

[redheeler]

Try this: System Preferences > Displays and uncheck "Automatically adjust brightness".

 

[Hexley]

thanks Red. How do you like your Retina Core i7?

 

[Hexley]

Try this: System Preferences > Displays and uncheck "Automatically adjust brightness".

I uncheck it and it still drops.