Error Message 51.00.YY Error for HP LaserJet M601, M602, M603 Series Printers.

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HP Say:

51.00.YY Error

Description

Laser/scanner error

  • YY = 20 Black laser/scanner error

Recommended action

  • Reconnect connector (J145) on the laser/scanner.
  • Reconnect connectors (J86 and J93) on the DC controller.
  • If the error persists, replace the laser/scanner.
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