HP error codes
HP LaserJet printers report faults using numeric codes: the first number identifies the subsystem, such as 50 for the fuser, 13 for paper jams and 49/79 for firmware, while the part after the full stop indicates the exact cause. The list below explains the most common code families and what you can safely try before calling a technician.
49.XX.YY
Firmware or communication fault
Details50.X
Fuser fault
Details51.XY
Laser unit (beam detect) fault
Details52.XY
Laser scanner motor fault
Details59.XX
Motor rotation fault
Details10.XX.YY
Supply memory (chip) fault
Details13.XX.YY
Paper jam
Details79.XX.YY
Firmware exception (often triggered by a job)
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