How to adjust the Contrast on the DG5 display
DataGuard 5 Displays
All Airflow units with DG5 board and Display
Text on the Screen is too dark or to light to read
Dismount the display and turn it over to face the back side. There will be a small hole in the upper right hand corner. Using a small flathead screwdriver you can turn the dial to the right to brighten the display and to the left to make it darker.