Daktronics Galaxy AF-3220 - Manual (Page 20)

16 Diagnostics and Troubleshooting
One or More LEDs Do Not Light or Are Stuck On
• Check the condition of the ribbon cables on the module
• Check for bent pins on module jacks
• Swap a known good ribbon cable with the suspect cable
• Swap a known good module with the suspect module
Section of the Display Does Not Work – Extending All the Way to Right End
• Check the ribbon cable from the last working
module in the row to the first non-working
module, as shown in
Figure 13.
• Check if the first non-working module is getting
power
• Swap the first non-working module with a
known good module to see if the problem moves
• Swap the last working module with a known
good module to see if the problem moves
One Row of Modules Does Not Work or Shows a Distorted Message
• Check the ribbon cable to the first non-working module
• Check for bent pins on the input and output jacks of the modules
• Swap the first non-working module with a known good module
• Swap the last working module with a known good module
Entire Display Fails to Work
• Make sure the main power source breaker is on
• Check the diagnostic LEDs on the controller for Power and Run. (Section 7.2)
• Initiate a test pattern using Venus® 1500 software
• Check the ribbon cables from the controller to the modules
Blank Display Seen After Boot-Up
A blank display is normal after the boot-up procedure. When finished, the display is blank except for a
flashing pixel in the lower-right corner. The display is waiting for a message to be sent. Once a message is
sent, the flashing pixel is replaced with the message.
Message Only Appears on One Side of the Display
• Make sure power is connected to the second face of the display
• Make sure the interconnect cable is connected between display faces
Signal
Flow
Last
working
module
Signal
Flow
First Non-working
Module
►
►
►
daktronics Galaxy
Figure 13: Modules Not Working