Daktronics Fuelight FL-4000 Series, Installation & Operation Manual

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Maintenance and Troubleshooting 25
6.3 Troubleshooting
This chart lists some symptoms that may be encountered with the displays. For each
symptom, possible causes and corrective actions are indicated. This list does not include
every possible problem but does represent some of the more common situations that may
occur.
Symptom/Condition Possible Cause Possible Solution
No display in the face/sign will
light.
Power incorrectly installed.
Check the power LED on the
host driver. If not lit, connect
power as described in Section
3 .
Multiple-line sign with all lines
showing the same prices, or data
appears on the wrong line.
Line and face numbers not set
correctly.
Set a different line number for
each display on each face (refer
to Section 4.1 ).
Garbled display.
Driver malfunction.
Check driver to make sure
signal cables are routed to the
correct digits.
Cycle power to the display.
Replace the driver.
Digit malfunction. Replace the digit.
Digit will not light.
Cable to the digit broken or
disconnected.
Check cable by switching it to a
different driver output.
Replace the cable.
Poor contact at driver connection. Clean the contacts.
Driver malfunction. Replace the driver.
Segment or several LEDs will not
light.
Poor contact at driver connection.
Clean the contact or replace the
harness.
Broken or disconnected cable between
driver and digit.
Replace the cable.
Broken LEDs. Replace the segment or digit.
Display shows “E4.”
No Message Error: This code is shown
when a price has not been set on the
display.
Use the control method to set
the price on the display.