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32 TNMC & Electronic Captions Maintenance & Troubleshooting
7.2 Initialization Information at Startup
Every time the display is powered up and there is no All Sport® signal present, the display
will run through an initialization process, during which it will test all LEDs and addresses.
First, the message center will display the proper address number.
If the entire display fails at startup, power may not be properly connected, or the address
setting may not be correct on the display driver. Check both in the event of a failure.
7.3 Display Troubleshooting Table
The table below lists potential problems with the display and indicates possible causes and
corrective actions. This list does not include every symptom that may be encountered, but it
does present several of the most common situations that may occur.
Many of the solutions offered below provide references to other sections within this manual
with further detail on how to fix the problem.
If a problem occurs that is not listed or that cannot be resolved using the solutions in the
following table, contact Daktronics using the information provided in
Section
‎
5.8 .
Symptom/Condition Possible Remedy
One or more LEDs on a single
module fails to light Check/replace the ribbon cables on the module.
Replace the module (see Section
‎
7.6) .
One or more LEDs on a single
module fails to turn off Check/replace the ribbon cables on module.
Replace the module (see Section
‎
7.6 ).
A section of the display not
working; section extends all the
way to the right side of the display
Check/replace the ribbon cables running to the first module
that is not working.
Replace the first module on the left side of the first module
that is not working (see
Section
‎
7.6 ).
Replace the second module that is not working
(see
Section
‎
7.6 ).
Replace the power supply assembly on the first module that is
not working (see
Section
‎
7.7 ).
One row of modules does not work
or is garbled
Replace the first module (see Section
‎
7.6 ).
A group of modules that share the
same power supply assembly fails
to work
Replace the power supply assembly (see Section
‎
7.7 ).
Entire display fails to work
Check for proper line voltage into the power termination
panel.
Check/replace the ribbon cable from the display driver to the
modules.
Check the voltage settings on the power supplies.
Check/replace the signal cable to the driver.