Removing a function of adjusting dark and bright

When the system is connected to a network, there will be a screen
From light to dark in the dark, lit from (the middle is white surrounded by black) process,


Advice on how to make it without this effect remains highlighted
Reply:
Never seen connected to the network screen changes color,
However, you can set the screen has been lit, as some game.
Specific functions forgotten long ago used.