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HP Color LaserJet 9050 series troubleshooting


To better help our customers - this HP Laserjet 9050 series troubleshooting page is simply a guide / additional information for your convenience, as you search for assistance in repairing your machine.

Although this information is provided for your convenience it is recommended, for the most part, that a technician inspects your office equipment. It is recommended to consult with a professional when ordering your printer part(s).

P/s use our SmartSearch to locate your part number.


  • LaserJet 9050 series Troubleshooting process
    • Troubleshooting process
    • Basic troubleshooting process flow
    • Preliminary operating checks
    • General troubleshooting information
    • Power-on

  • Control Panel messages and error codes
    • Troubleshooting by using control-panel messages
    • Event log page
    • Control-panel messages
    • Control-panel and event-log message format
    • Printer-message tables
    • Alphabetical error messages
    • Numerical error messages

  • Image, media, and communication troubleshooting
    • Image-formation troubleshooting
    • Check the print cartridge
    • Image-defect tables
    • Repeating defect ruler
    • Media troubleshooting
    • Determine the problem source: media or printer
    • Isolate a paper path
    • Isolate a media brand
    • Isolate a media type
    • Communication troubleshooting
    • Communications check
    • Jetdirect configuration
    • Embedded LAN troubleshooting

  • Configuration pages, tray 4, and paper jam troubleshooting
    • Tray 4 diagnostics
    • Diagnostics label
    • Motor test
    • Standalone running test
    • Sensor test
    • Light-pattern interpretation
    • Jam troubleshooting
    • Jams
    • Customer print job
    • Clearing jams
    • Evaluate the information pages
    • Configuration page
    • Jetdirect page
    • Supplies status page
    • Usage page
    • File directory page

  • Diagnostics service information
    • User- and service-level diagnostics
    • Paper-path test
    • Service test
    • Service-level diagnostics
    • Engine test
    • Service menu
    • Diagnostics flowchart
    • Other diagnostics for the HPLaserJet 9000 series
    • Cold reset
    • Other diagnostics for the HPLaserJet 9040/9050 series


Q3721A HP LaserJet 9050 Supplies
Part Number Description Price
43X HI YIELD BLACK TONER $199.01
43X HI YEILD BLACK TONER (COMPATIBLE) $136.82
8MB simplified Chinese MROM DIMM - For LaserJet printers $90.00
16MB, 100-pin SDRAM DIMM memory module $90.00
Replacement staple cartridge - Contains 5000 staples $42.00
Replacement staple cartridge assembly - Holds 5000 staples $32.00
Fusing Assembly - For 100 VAC to 127 VAC - Bonds toner to paper with heat $635.00
Fusing Assembly - For 100 VAC to 127 VAC - Bonds toner to paper with heat $635.00
Fusing Assembly - Bonds toner to paper with heat - For 100V to 127V Operation $601.07
Fusing Assembly - Bonds toner to paper with heat - For 100V to 127V Operation $345.00
Fusing Assembly - Bonds toner to paper with heat - For 220-240V $442.00
Fusing Assembly - Bonds toner to paper with heat - For 220-240V $442.00
Fusing Assembly - For 100 VAC to 127 VAC - Bonds toner to paper with heat $635.36
Fusing Assembly - For 220 VAC to 240 VAC - Bonds toner to paper with heat $874.52
Duplexer assembly kit - Required for two-sided printing - Includes the duplexer assembly and installation instructions (multi-lingual) $475.00
HP Ultra-Precise print cartridge (Smart print cartridge) - Will print approximately 30,000 pages based on a 5% print density $275.88
43X HI YEILD BLACK TONER (COMPATIBLE) $189.67
128MB, 100-pin SDRAM DIMM memory module $180.00
128MB, 100-pin SDRAM DIMM memory module $155.00
Maintenance Kit (120V) - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer roller $539.60
Maintenance Kit (120V) - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer roller $539.60
LaserJet 9000 series Maintenance Kit (120V) - Replacement parts after 350k pages -Includes Fusing Assembly, seven Feed/Separation rollers, two Pickup rollers and one Transfer roller $610.00
LaserJet 9000 series Maintenance Kit (120V) - Replacement parts after 350k pages -Includes Fusing Assembly, seven Feed/Separation rollers, two Pickup rollers and one Transfer roller $610.00
Maintenance Kit - For 120 VAC operation - Replacement parts after 350k pages - Includes fuser assembly, seven feed/separation rollers, two pick-up rollers and transfer roller $677.78
Maintenance Kit (120V) - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer roller $462.50
Maintenance Kit - For 120 VAC - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer roller $699.44
Maintenance Kit (120V) - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer roller $509.00
Maintenance Kit (120V) - Replacement parts after 350K pages includes, Fusing assembly, seven Feed/Separation rollers, two Pickup rollers and Transfer roller assembly $450.00
Maintenance Kit (120V) - Replacement parts after 350K pages includes, Fusing assembly, seven Feed/Separation rollers, two Pickup rollers and Transfer roller assembly $450.00
Maintenance Kit (220V) - Replacement parts after 350K pages - Includes, fusing assembly, seven feed/separation rollers, two pickup rollers and transfer roller $498.75
Maintenance Kit (220V) - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer Roller $498.75
Maintenance Kit - For 220 VAC - Replacement parts after 350K pages - Includes, fusing assembly, seven feed/separation rollers, two pickup rollers and transfer roller $520.00
Maintenance Kit (220V) - Replacement parts after 350K pages - Includes, fusing assembly, seven feed/separation rollers, two pickup rollers and transfer roller $520.00
Maintenance Kit (220V) - Replacement parts after 350K pages - Includes, fusing assembly, seven feed/separation rollers, two pickup rollers and transfer roller $690.41
Maintenance Kit (220V) - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer Roller $498.75
Maintenance Kit - For 220 VAC - Replacement parts after 350K pages - Includes, fusing assembly, seven feed/separation rollers, two pickup rollers and transfer roller $610.00
Maintenance Kit (220V) - Replacement parts after 350K pages - Includes, fusing assembly, seven feed/separation rollers, two pickup rollers and transfer roller $610.00
Maintenance Kit (220V) - Replacement parts after 350K pages - Includes, fusing assembly, seven feed/separation rollers, two pickup rollers and transfer roller $520.00
Maintenance Kit (220V) - Replacement Parts after 350k Pages Includes, Fusing Assembly, 7 Feed/Separation Rollers, 2 Pickup Rollers and Transfer Roller $520.00
External JetDirect 300X LAN interface module - Interfaces a parallel printer to an ethernet 10Base-T (RJ-45) or 100Base-TX (RJ-45) LAN $240.00
JetDirect connectivity card - Has one USB port, one serial (DB9) port, and one LocalTalk port $183.65
JetDirect connectivity card - Has one USB port, one serial (DB9) port, and one LocalTalk port - Plugs in one of the EIO slots on selected DesignJet and LaserJet printers $245.00
JetDirect 610N internal print server (10Base-T and 100Base-TX) LAN interface board - Plugs into peripheral EIO slot - Has a RJ-45 connector - Comes with software on CD-ROM and manual $90.00
HP JetDirect 680N internal wireless IEEE-802.11b (Wi-Fi) print server - Plugs into peripheral EIO slot $497.00
HDD, EIO 40G ROHS HIGH PERFORMANCE HARD DISK - PLUGS IN ONE OF THE EXTENDED INPUT/OUTPUT (EIO) SLOTS $440.00
HDD, EIO 40G ROHS HIGH PERFORMANCE HARD DISK - PLUGS IN ONE OF THE EXTENDED INPUT/OUTPUT (EIO) SLOTS $440.00
HDD, EIO 40G ROHS HIGH PERFORMANCE HARD DISK - PLUGS IN ONE OF THE EXTENDED INPUT/OUTPUT (EIO) SLOTS $540.60
HDD, EIO 40G ROHS HIGH PERFORMANCE HARD DISK - PLUGS IN ONE OF THE EXTENDED INPUT/OUTPUT (EIO) SLOTS $440.00
HDD, EIO 40G ROHS HIGH PERFORMANCE HARD DISK - PLUGS IN ONE OF THE EXTENDED INPUT/OUTPUT (EIO) SLOTS $440.00
High performance 20GB hard disk - Plugs in one of the Extended Input/Output (EIO) slots $275.00
High performance 20GB hard disk - Plugs in one of the Extended Input/Output (EIO) slots $275.00
High performance 20GB hard disk - Plugs in one of the Extended Input/Output (EIO) slots $275.00
High performance 20GB hard disk - Plugs in one of the Extended Input/Output (EIO) slots $275.00
JetDirect 620n internal print server - 10BaseT and 100BaseTX LAN interface board - Plugs into peripheral EIO slot - Has an RJ-45 connector $305.00
JetDirect 620n internal print server - 10BaseT and 100BaseTX LAN interface board - Plugs into peripheral EIO slot - Has an RJ-45 connector $370.00
JetDirect 620N internal print server LAN interface board - 10Base-T and 100Base-TX - Plugs into peripheral EIO slot, has RJ-45 connector. $305.00
JetDirect 620n internal print server - 10BaseT and 100BaseTX LAN interface board - Plugs into peripheral EIO slot - Has an RJ-45 connector $407.55
JetDirect 620N internal print server LAN interface board - 10Base-T and 100Base-TX - Plugs into peripheral EIO slot, has RJ-45 connector. $305.00
HP JetDirect 620n internal print server - 10BaseT and 100BaseTX LAN interface board - Plugs into peripheral EIO slot - Has an RJ-45 connector $305.00
HP 64MB 100-pin DDR DIMM - Used to add flash memory-based accessory fonts, macros, and patterns $50.00
HP 64MB 100 Pin DDR DIMM - Used to add flash memory-based accessory fonts, macros, and patterns $50.00
128MB, 100-pin, DDR SDRAM DIMM memory module $150.00
128MB, 100-pin, DDR SDRAM DIMM memory module $150.00
HP 256MB 100 Pin DDR DIMM - Used to add flash memory-based accessory fonts, macros, and patterns $140.00
133 MHz 128MB, 100-pin SDRAM DIMM memory module Synchronous DRAM DIMM $758.10
133 MHz 128MB, 100-pin SDRAM DIMM memory module Synchronous DRAM DIMM $155.00
HP 32MB 100 Pin DDR DIMM - Used to add flash memory-based accessory fonts, macros, and patterns $69.00
HP 64MB 100-pin DDR DIMM - Used to add flash memory-based accessory fonts, macros, and patterns $50.00
128MB, 100-pin, DDR SDRAM DIMM memory module $420.00
HP 256MB 100-pin DDR DIMM - Used to add flash memory-based accessory fonts, macros, and patterns $789.69
Delivery assembly - Includes the curved plastic structure, various rollers and gears, and the 'L' shaped metal support structure with three fans $168.95
Transfer roller assembly - Includes both transfer guides and transfer roller $50.00
Transfer roller assembly - Includes both transfer guides and transfer roller $50.00
Registration roller assembly $292.41
Fusing Assembly - Bonds toner to paper with heat - For 100V to 127V Operation $345.00
Fusing Assembly - Bonds toner to paper with heat - For 100V to 127V Operation $345.00
Fusing Assembly - Bonds toner to paper with heat - For 100V to 127V Operation $345.00
Fusing Assembly - Bonds toner to paper with heat - For 100V to 127V Operation $345.00
Fusing Assembly - Bonds toner to paper with heat - For 220V to 240V operation $690.00
Fusing Assembly - Bonds toner to paper with heat - For 220V to 240V operation $690.00
Fusing Assembly - Bonds toner to paper with heat - For 220-240V operation $570.00
Fusing Assembly - Bonds toner to paper with heat - For 220-240V operation $570.00
Fusing assembly high voltage cable and connectors $10.85
2,000-sheet paper cassette tray (Tray 4) - Part number is for the paper tray ONLY $910.00
Vertical registration assembly $165.00
Vertical registration assembly $169.67
Fusing assembly high voltage cable and connectors $13.54
Tubeaxial fan (fan 4) - Mounts on the upper left crossmember on the delivery assembly $75.00
Black toner cartridge switch - Detects when black cartridge is in correct position $10.00

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