Daktronics Galaxy AF-3400 34 mm Monochrome/RGB - Manual (Page 43)

7.3 Troubleshooting Display Problems
This section contains some symptoms that may be encountered in the displays. This list does
not include every possible symptom or solution but does represent common situations and
simple steps to resolve them. The solutions are given in priority order so try the first solution
first.
Troubleshooting may require removal and replacement of modules. Refer to Section 6.1 for
instructions on this procedure. When replacing modules, make sure that the power and
signal cables are reconnected correctly and the latches are tightly closed.
Module and LED problems
One or more LEDs are not lighting.
• Check/replace the ribbon cables on the module.
• If that does not help, the module may need to be replaced.
One or more LEDs on a single module will not turn off.
• Check/replace the ribbon cables on the module.
• If that does not help, the module may need to be replaced.
A section of the display is not working, extending all the way to the right end.
• Check/replace ribbon cables from the last working module in the row to the first non-
working module next to it (Figure 34).
• Move or replace the first non-working module.
• Move or replace the last working module.
• Check that the power LED on the back of the modules is ON.
• Make sure the power cable to the module is connected.
Figure 34: Modules Not Working
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 (Figure 34).
• 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.
Diagnostics and Troubleshooting
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