To adjust the screen contrast and backlight:
1.Press 
.
2.Enter the Manager Password and press Enter. The default password is 1234. The Configure screen appears.
3.Press System.
Use the buttons as follows:
Button Function
Contrast + Increases screen contrast.
Contrast – Decreases screen contrast.
Backlight + Makes the screen brighter.
Backlight – Makes the screen darker.
4.When you are finished, press OK.
5.Press Return to return to the product screen.