Diagnostics and Troubleshooting
13
4.2 Troubleshooting
This section lists potential problems with the display, indicates possible causes, and suggests
corrective action. This list does not include every possible problem, but it does represent
some of the more common situations that may occur. (Refer to the appropriate manual for a
list of potential problems with add-on or separately mounted message centers.
Symptom/
Condition
Possible Cause
Solution
No displays in the
sign will light
•
Power incorrectly set up.
•
Addresses not set correctly.
•
Open display with host driver
and check Power LED
(Section 4.2).
•
Check each driver to verify
correct address settings
(Section 3.2).
Multiple line sign
with all lines
showing same
prices
•
Addresses not set
correctly.
•
Set up different address for
each line of sign (Section 3.2).
Digit will not light
•
Black wire to digit broken.
•
Poor contact at driver
connection.
•
Driver
malfunction.
•
Replace
harness.
•
Clean
contacts.
•
Replace
driver.
Segment or several
LEDs will not light
•
Broken
LEDs.
•
Driver
failure.
•
Broken wire between
driver and digit.
•
Poor contact at driver
connector.
•
Replace segment or digit.
•
Replace
driver.
•
Replace
harness.
•
Clean contact or replace
harness.
Segment or digit
stays lit
•
Driver
failure.
•
Short circuit on digit.
•
Replace
driver.
•
Replace
harness.
Data appears in the
wrong place on the
sign
•
Signal connections are
not correct.
•
Reconnect signal wiring to
drivers (Section 3.2).
Data appears on the
wrong line of the
display
•
Incorrect address settings
on drivers.
•
Change addresses on drivers
(Section 3.2).
Display shows "E4".
•
No Message Error: This
code is shown when no
messages are
downloaded to the
display.
•
Download a new message to
the display using the [Update
Display] key on the
DataMaster 100 controller.
