1.Press the MENU button.
2.Use the up and down arrow keys to locate Screen/Sounds or Screen & Sound Options. Press the Select soft key.
3.Use the up and down arrow keys to locate the option Contrast. Press the Select soft key.
4.Use the left and right arrow keys to adjust the brightness as required.
5.When completed, press the Done soft key.
6.Press the Exit soft key to exit the menus.