Daktronics DSF-600 Series, Manual

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Maintenance & Troubleshooting 23
4.11 Troubleshooting
This table lists some problems that may be encountered while operating the display. Next to each problem are
troubleshooting steps that may help to resolve it. While this list does not cover all possible problems that may
occur, it does cover those that occur most often.
Display Problem Troubleshooting Steps
Entire display is blank.
• Ensure the display controller is receiving power by checking the
power indicator light on the front of the controller. Refer to display
layout for location.
• Ensure the display is receiving power and all breakers are turned
on. When power is applied to the display, power supply LEDs
should turn on.
• Ensure content is being sent to the display.
• Ensure the fiber-optic signal cable is connected to the DMP. The
input signal should be locked. If the input signal is not locked, check
the fiber connections.
Section of display is blank.
• Ensure the power status LEDs on the modules, power supplies, and
ProLink routers (PLRs) in the blank section are on.
• Ensure the connections to the PLR are secure. Change the
connections with one another to test.
• Check the SATA cable connections between the modules and the
PLR in the blank section. Check the connection to the left most
module first (from the front of the display).
• Ensure the modules are receiving logic power. Signal will not pass
through a module that does not receive logic power.
Whole display is blank or garbled.
• Check the power status LED on the PLR in the blank section.
• Verify the status indicator digit on the PLR is flashing.
• Ensure the connections to the PLRs are secure. Change the
connections with one another to test.
• Check the PLR connections in the garbled section.
Entire display is garbled or uncontrollable.
• Check the status LEDs on the PLR and Display Controller to ensure
they are receiving power.
• Ensure the fiber-optic signal cable is connected to the VIP. The input
signal should be locked. If the input signal is not locked, check the
fiber connections.
Module is blank.
• Check the power status LEDs on all power supplies connected to
the module.
• Check the SATA cable input into the module and the output from the
previous module or PLR.
Single module is garbled.
• Check the SATA cable input to the module and the output from the
previous module or PLR.
• Ensure all connections on the module power supplies are tight. A
garbled module can be an indicator of power supply failure. A module
with no power is blank and does not pass signal to the next module.