Daktronics AF-3700-20 RGB - Manual (Page 41)

7.3 Troubleshooting Display Problems
This section contains some symptoms that may be encountered with 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
• Check/replace ribbon cables from the last working module in the row to the first non-
working module next to it (Figure 46).
• Check the back of the modules to see that the power LEDs are on.
• Make sure the power cable to the module is connected.
• Move or replace the first non-working module with the one on the far left of the non-
working section.
• Move or replace the first module to the left of the non-working modules.
Figure 46: 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.
• 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 first module to the left of the one that isn’t working.
• Check the fuse from the power supply output and replace if necessary.
Diagnostics and Troubleshooting 31