Daktronics Galaxy AF-3500 Series 46 mm - Manual (Page 31)

Diagnostics and Troubleshooting 27
Display Problems
Blank display seen after boot-up

A blank display is normal after the boot-up procedure. When
finished, the display will go blank except for a flashing pixel in
the lower-right corner. This indicates the display is waiting for
a message.
One or more LEDs are not lighting

Check/replace the ribbon cables on the module.

Replace the module.
One or more LEDs on a single module
will not turn off

Check/replace the ribbon cables on the module.

Replace the module.
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. Refer to
Figure 30 for an example.

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 left of the non-working section.

Move or replace the first module to the left of the non-working
modules.
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 non-working
module.
A column of the display does not work

Check that the power cable plugs into the module in the
column.

While power is on, look at the back of the malfunctioning
modules to see if the diagnostic LED is off, implying a power
supply problem.

Verify power to the power supply.
Entire display fails to work

Check the breakers in the building connected to main power
source.

Check the breakers in the power termination panel.

Check the diagnostic LEDs on the controller for Power and
Run. Refer to Section 7.1 for more information.

Check/replace the ribbon cable from the controller to the
modules.

Verify proper use of the software by checking the software
manual.
Section of display looks dim

Check V Adjust cable on module is plugged in.