Hope this help, I received this from Neptune
The best way to determine if you have a back-light on the display would be to unplug the display from the AquaBus port and then plug it back in and did you notice any change in the lighting for the display panel?
Not Recoverable:
If the answer is
DARK no back light then the display would need to be sent in for further diagnosis.
Possibly Recoverable:
If the answer is
YES, there is a bright blue/orange backlight then we will have you try to update the display modules firmware following the instructions below.
Recovering the Display
Log into the classic Dashboard with the instructions below:
- Go to configuration > Module Setup
- Choose your display module from the drop down list.
- If you have multiple display listed, choose the display module with the highest AquaBus address.
- Click the update firmware button.
- Click the submit module change.
- Wait 10 seconds to see progression of the module firmware.
- If you do not see that the module is being updated at the bottom of the screen then remove from the AquaBus and plug it back in.
- If you still do not see any progression, then try removing from the AquaBus an additional time.
- If you had multiple displays listed please try the steps above on the other display modules.
- If you see updating firmware progression, then more than likely, your display screen will turn on shortly.