Diagnostics: PLR Hardware failure

Potential Symptoms

  • May be visual or non-visual error.
  • Hardware Failure event on PLR in IDM.
  • Communication failure alert may be present in IDM.

IDM / System Health Event(s)

  • Hardware Failure event on PLR.


  • Product Family: Billboards
  • Product: DB-4000, DB-4100, DB-4200, DB-5000, DB-6000, DB-6400, GC6, GP3, GP4, DVX
  • Component: PLR605x
  • Control System:


  • PLR has failed.
  • The ProLink Router (PLR) is not operating correctly and is likely not routing video to its modules correctly.


  1. Run the PLR self test. How to perform a PLR-6050 self test, DD2268420.
  2. Capture the error codes on the PLR seven-segment display.
  3. Replace the PLR and include the error codes when sending it to be serviced.

For Temporary Operation

  • Power cycle the PLR.
  • Ensure PLR Firmware is up to date.

KB ID: DD2713183

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