Row of blank or flickering modules, Failed module output

Potential ​Symptoms

  • Row or strip of blank or flickering modules.
  • Line going through MOD or row of MODs.
  • Row of mods are missing specific colors and are only half lit on that specific color.

IDM Symptom

  • Communication Failure alert on blank modules in IDM.
  • Checksum Error alert on modules that have line(s) going through them or missing colors.


  • Product Family: Billboards; Message Displays
  • Product: Galaxy: AF-3010, AF-3020, AF-3050, AF-3060, AF-3080, AF-3090, AF-3150, AF-3160, AF-3165, AF-3180, AF-3190, AF-3197, AF-3200, AF-3220, AF-3400, AF-3500, AF-3550; GalaxyPro: AF-3700, GPR (Revolution), GS6; Billboard: DB-1000, DB-2000, DB-3000, DB-4100, DB-4200
  • Component:
  • Control System:


  • Failed output on a module.


  • Replace failed module.

Note:  Blank (empty) module may be available for some display types.

For Temporary Operation

  • Move module to the end of the signal chain to mitigate visual issue (if module has a bad output, no visual issue will be seen).
    • The end of the signal chain is either the right side of a single display, the right side of the mirror face on a 2v configuration.

KB ID: DD1988623

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