Blank module(s) on display, Issue follows module, Failed module

Potential ​Symptoms

  • Blank module or row of modules.
  • Module blank. Content may or may not be shifted down the rest of the signal stream.
  • Issue follows module at a new power supply location on the display.
  • DB-4000 modules and above do not respond to self test.
  • No LED indicator lit on back of module even though getting proper voltage.
  • Module fails to accept firmware update.
  • Power connection on module broke off.
  • A single module is garbled or scrambled.
  • Discolored module or row of modules.

IDM / System Health Event(s)

  • Communications Failure alert on mods.
  • Missing Firmware on blank modules.


  • Product Family: Billboards, Message Displays, Video
  • Product: DB-1000, DB-2000, DB-3000, DB-4000, DB-4100, DB-4200, DB-5000, DB-6000, DB-6400, DVX, 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, GC6, GS6, GT6, AF-3700, GPR (Revolution), GP3, GP4, GPC
  • Component: Module
  • Control System:


  • Failed module.


  • Replace failed module.

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

For Temporary Operation

  • If no replacement modules are available, move module to end of signal chain to minimize the visual impact.
    • The end of the signal chain is either the right side of a single Galaxy display or the right side of the mirror face on a 2v configuration.
    • For displays with PLRs, try to locate bad mods next to each other to minimize outage area.

Related Articles

KB ID: DD2031383

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