Daktronics Valo Digital Billboard - Manual (Page 14)

Display Troubleshooting 6
Blank module
•
Check the power status LEDs on all power supplies connected to the
module. If a power indicator LED is off, check to make sure the fuse
on the power supply output is intact and all power connections are
securely fastened.
•
Check the ribbon cable input to the module and the output from the
previous module or multi-line controller.
Blank half-module
•
Check the ribbon cable of the module to the left of the blank module.
Garbled half-module
•
Check the ribbon cable connections between modules and the multi-
line controller in the garbled section. From the front of the display,
check the connection of the left-most module first.
Garbled module
•
Check the ribbon cable input to the module and the output from the
module to its multi-line controller.
•
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 will be blank and will not pass signal to the next
module.
Garbled row
•
Check the ribbon cable connections between the modules and the
multi-line controller in the garbled section. From the front of the
display, check the connection of the left-most module first.
Garbled or uncontrollable display
•
Check the data distributor receiver board status LEDs to make sure it
is receiving power.
•
Verify the V-Link configuration.
•
Ensure the fiber-optic signal cable is connected to the data distributor
and the signal is locked and receiving configuration.
•
Verify all RJ45 connections and ribbon cables are connected to the
correct locations.
Section of display is lighter than
rest
•
Test RJ45 cable input for the multi-line controller.
•
Test the power supply for the multi-line controller.
•
Replace the multi-line controller.
Discolored 1 high × 4 wide module
section
•
Check that RJ45 and power connections to the multi-line controllers
are securely fastened.
•
Verify that calibration frame being used is correct, and re-send if
required.
Discolored module
•
Check all ribbon cables and make sure all power connections are
securely fastened.
•
Verify the correct calibration frame is being used.
Hanging module
•
Check the module to see if the module will reinsert and lock into the
display. If it does not lock to the display, replace it with a spare
module and send the old module to Daktronics for repair.