One or more modules blank, Power supply harness unplugged

​​​Potential Symptoms

  • Module/Modules blank.
  • MLC or PLR no power.
  • No power LED lit on module/s.
  • No input or output voltage on any modules connected to same power harness.
    • Some harnesses power a single module and others power multiple through jumper harnesses.


  • Product Family: Billboards, Video Displays, Message Displays
  • Product: AF-3500, AF-3550, AF-3400, AF-3200, DB-1000, DB-2000, DB-3000, DB-4000, DB-6000, GPR, GPC, GS6, RTN
  • Component: Power harness
  • Control System:


  • Unplugged power cable connection on either end of power harness.


  • Reseat or connect any power cables that appear loose or disconnected to ensure proper connections.

KB ID: DD2641183

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