I don't recall which LED controller was used for the buttons, but if it is the Ipac UIO, then the LED's will turn off with the computer, in sleep mode, or when the FE is exited. If an LEDWiz is being used, it is easy to connect a relay to the computer's usb port to turn the power supply for the LED's on and off with the computer (as well as ambient and marquee lighting), achieving the same effect. Unless you want to be able to turn off the LED's during game play, that should be enough control, and considering that the whole point is to be able to have the buttons light up based on the game you are playing, I can't really see wanting to be able to turn them off manually..