Error Message 11.00.YY Internal clock error for HP LaserJet M601, M602, M603 Series Printers.

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HP Say:

11.00.YY Internal clock error

Description

The product real time clock has experienced an error.

  • 01=dead clock
  • 02=dead real time clock

Recommended action

CAUTION: The fuser might be hot. Be careful when removing the fuser