Daktronics Galaxy AF-3400 20 mm Monochrome/RGB Double-face Displays - Manual (Page 42)

Diagnostics and Troubleshooting 34
One row of modules is not working or shows a distorted message
• Check/replace the ribbon cables to and from the first non-working module.
• Check for bent pins on the jack going to a non-working module.
• Move or replace the modules that show distorted text.
• Move or replace the last working module.
• Make sure that the first module in the row is receiving power.
A column of the display does not work.
• Check that the ribbon and power cable are plugged into the first module in the row.
• While power is on, look at the back of the first malfunctioning module to see if the
diagnostic LED is off, implying a power supply problem.
Entire display fails to work
• Check diagnostic LEDs on the controller for Power and Run. (Section 7.1)
• Check the breakers in the building connected to main power source.
• Check the breakers in the power termination panel.
• Check/replace the ribbon cable(s) from the controller to the modules.
• Verify proper use of the software by checking the software manual.
Brightness problems
Display is stuck on bright or dim
• Check Manual/Auto dimming in Venus 1500 software. The Brightness is typically set to
Automatic. If not, perform the following step:
> In Display Manager/ Diagnostics, change the slide bar and click Set Brightness.
• Check the light sensor cable and wiring for secure connections.
• Check the light sensor lens for obstructions (top left edge, front of primary cabinet).
• Replace the light sensor assembly.
Display is too bright at night
Set the Dimming Schedule. Refer to the Venus 1500 manual.
Message problems
Blank display seen after boot-up
A blank display is normal after the boot-up procedure. When finished, the display will be
blank except for a flashing LED in the lower right corner. The display is then waiting for
a message to be sent.
LED flashes in the lower right corner
The flashing pixel indicates that the display is receiving power and waiting for a message
to be sent. Once a message is sent, the flashing LED should be replaced with the message.
Message only shows up on one side of the display
• Check/replace ribbon cables from the last module on Face A to the first module in
Face B (Figure 35).
• Move or replace the first non-working module.
• Move or replace the last working module in Face A.
• Check that the power LED is on at the back of the modules.
• Make sure the power cable to the module is connected.