Updated: Jun 29, 2021
Service PIN Codes for HP LaserJet Printer Service Menus
HP's latest laser printer models require the entering of a PIN code to access the Service Menu. PIN codes can be found in most OEM service manuals.

Service Menu is intended for repair technicians and generally includes options like clearing the event log, changing the maintenance count, maintenance interval. We do not recommend end-users enter this mode. How to use it? examples of use.
Printer Repair Technicians can use this menu to gain access to printer settings that are reserved for service personnel.
The service menu is protected by the use of a personal identification number (PIN). When you select SERVICE from the list of menus, you are prompted to type an eight-digit PIN code.
HP Printer Model Service Menu Access PIN Codes
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LaserJet 2300 11230002
LaserJet 2410 10241004
LaserJet 2420 10242004
LaserJet 2430 10243004
Color LaserJet 3000 11300005
Color LaserJet 3500 10350003
Color LaserJet 3550 10350004
Color LaserJet 3600 11360005
Color LaserJet 3700 10370003
Color LaserJet 3800 11380005
LaserJet 4100 MFP 04410002
LaserJet 4101 MFP 04410002
LaserJet 4200 11420002
LaserJet 4240 04424005
LaserJet 4250 09425004
LaserJet 4300 11430002
LaserJet 4345 MFP 11434504
LaserJet 4350 09435004
Color LaserJet 4600 04460002
Color LaserJet 4610 05465004
Color LaserJet 4650 05465004
Color LaserJet 4700 09470005
Color LaserJet 4730 MFP 09473005
LaserJet 5200 05520006
Color LaserJet 5500 04550002
Color LaserJet 5550 09555004
LaserJet 9000 / 9000 mfp 00900001
LaserJet 9040 04904005
LaserJet 9050 09905004
LaserJet 9040 mfp 11904004
LaserJet 9050 / 9050 mfp 11905004
LaserJet 9500 04950003
LaserJet 9500mfp 11950004
LaserJet CM3530 11353008
LaserJet CM4349 11434506
LaserJet CM4540 11454010
LaserJet CM4730 05473007
LaserJet CM6030 04603008
LaserJet CM6040 04604008
LaserJet CM8050 704938
LaserJet CM8060 704938
LaserJet CP3505 06350507
LaserJet CP3525 09352508
LaserJet CP4005 10400506
LaserJet CP4025 11402509
LaserJet CP4525 11452509
LaserJet CP5525 11552010
LaserJet CP6015 03601508