Display face blank, relay for display reading opposite during reboot command

Potential Symptoms

  • Display face is blank.
  • Display powers on during reboot command to relay but then shuts back off when command is completed.


  • Product Family: Billboard Display
  • Product: DB-4200
  • Component: Smartlink
  • Control System: DMP-8065


  • Relay is starting in wrong state during a reboot command.


  1. Adjust relay to start in normally closed state.
    1. From the smartlink dashboard for the display select the three dots next to the affected relay.
    2. Click on Relay Settings.
    3. Select the Normally Closed check box.
    4. Click submit.

KB ID: DD4157040

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