Blank Display
Why is my display blank?
If your color graphic display (display size is approximately 3.5" X 5") is blank it is possible that the display contrast has been turned down by accident. If the contrast is at its lowest level the display will appear blank.
Display part numbers: EC66FPDH and EC66FPDV
To adjust display brightness
From the manual menu display:
The F1 button increases the brightness of the display. Press repeatedly to make the display progressively brighter.
The F2 button decreases the brightness of the display. Press repleatedly to make the display progressively darker