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HP Color LaserJet 4550 series troubleshooting


To better help our customers - this HP Color Laserjet 4550 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.


  • Troubleshooting basics and error messages
    • Pre - troubleshooting Checklist
    • Control Panel Message
    • Troubleshooting Paper Path Problems
    • Service Mode
    • Cold Reset
    • Diagnostic Mode
    • Engine Test
    • NVRAM Initialization

  • Printer options and consumables
    • Identifying Consumables
    • Printer Option & Replacement Parts

  • Printer media specifications and toner information
    • Supported Media Weights and Sizes
    • Media Requirements
    • General Tips
    • Approximate replacement intervals for consumable items
    • Potentional Toner Cartridge Issues
    • HP Planet Partners
    • Toner Cartridge Refill Statement

  • Printer power supply and input / output info
    • AC/DC Power Supply
    • High - Voltage Power Supply
    • Protection System
    • Enhanced I/O (EIO) Configuration
    • HP JetDirect Print Servers
    • Local Talk I/O
    • CPU
    • Fast InfraRed Reciever (Optional)
    • Bidirectional Parallel Interface
    • IEEE - 1284 Compliant parallel cables
    • Configuring the Computer Interface


C7085A HP Color LaserJet 4550 Supplies
Part Number Description Price
Fuser kit - Contains fuser assembly, one separation roller, three feed rollers, both air filters, hand wipe and installation guide - 110/120 VAC $306.95
YEILD BLACK TONER (COMPATIBLE) $59.04
Magenta toner cartridge - Contains toner and developer $124.64
Fuser kit - Contains fuser assembly, 2 separation/2 pickup rollers, both air filters, and cleaning cloth - 220/240 volt $433.55
Fuser kit - Contains fuser assembly, 2 separation/2 pickup rollers, both air filters, and cleaning cloth - 220/240 volt $433.55
Fusing assembly (For 120V, 60Hz operation) - Bonds the toner to the paper with heat $408.69
Transfer kit - Contains Itermediate Transfer Belt, secondary transfer roller, both air filters and toner cloth $257.36
JetDirect connectivity card - Has one USB port, one serial (DB9) port, and one LocalTalk port $125.69
JetDirect 610N internal print server (10Base-T and 100Base-TX) LAN interface board - Plugs into peripheral EIO slot - Has a RJ-45 connector. $90.00
JetDirect 615N internal print server LAN interface board - 10Base-T and 100Base-TX - Plugs into peripheral EIO slot, has RJ-45 connector. $145.00
JetDirect 620n internal print server - 10BaseT and 100BaseTX LAN interface board - Plugs into peripheral EIO slot - Has an RJ-45 connector $328.19
JetDirect 620N internal print server LAN interface board - 10Base-T and 100Base-TX - Plugs into peripheral EIO slot, has RJ-45 connector $328.19
Magenta toner cartridge $191.62
Black toner cartridge - For sale in Europe ONLY $113.79
Fuser kit - Contains fuser assembly, one separation roller, three feed rollers, both air filters, hand wipe and installation guide - 110/120 VAC $345.00
Fuser kit - Contains fuser assembly, one separation roller, three feed rollers, both air filters, hand wipe and installation guide - 110/120 VAC $345.00
Rowel swing assembly $13.94
Fuser deflector kit - Includes black paper deflector, gray tab, and spring on left end $17.05
Fuser kit - Contains fuser assembly, two separation/two pickup rollers and both air filters - 220/240 VAC $342.00
YEILD CYAN TONER (COMPATIBLE) $85.69
YEILD MAGENTA TONER (COMPATIBLE) $85.69
Yellow toner cartridge - Contains toner and developer $124.64
Fuser kit - Contains fuser assembly, one separation roller, three pickup rollers, both air filters, and a cleaning cloth - 110/120 volt $267.20
8MB simplified Chinese MROM DIMM - For LaserJet printers $90.00
Intermediate Transfer Belt (ITB) assembly $361.67
Fusing assembly (For 120V, 60Hz operation) - Bonds the toner to the paper with heat $408.69
Fusing assembly (240v, 50Hz operation) - Bonds the toner to the paper with heat $299.40
16MB, 100-pin SDRAM DIMM memory module $90.00
JetDirect 600N EIO internal print server 10Base-T, 10BASE-2, and LocalTalk LAN interface board - Has one RJ-45, BNC, and 8-pin DIN connector $76.71
JetDirect 600N EIO internal print server 10Base-T, 10BASE-2, and LocalTalk LAN interface board - Has one RJ-45, BNC, and 8-pin DIN connector $100.00
EIO 20 GB DISK DRIVE up to 40 GB DISK DRIVE EIO hard drive $320.00
JetDirect 615N internal print server (10Base-T and 100Base-TX) LAN interface board - Plugs into peripheral EIO slot - Has a RJ-45 connector. $135.00
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 LAN interface board - 10Base-T and 100Base-TX - Plugs into peripheral EIO slot, has RJ-45 connector. $305.00
32MB, 100-pin SDRAM DIMM memory module $82.94
Photoconductive drum cartridge kit - Photosensitive drum and waste toner collection reservoir assembly - Transfers image colors to intermediate transfer belt $101.47
Magenta toner cartridge - For sale in Europe ONLY $181.54
Fuser kit - Contains fuser assembly, two separation/two pickup rollers and both air filters - 220/240 VAC $342.00
Fusing assembly (120V, 60Hz operation) - Bonds toner to paper by heat $332.50
Intermediate Transfer Belt (ITB) assembly $405.00
Fuser kit - Contains fuser assembly, two separation/two pickup rollers and both air filters - 220/240 VAC $342.00
Black toner cartridge - Contains toner and developer $85.88
YEILD YELLOW TONER (COMPATIBLE) $85.69
DRUM UNIT (COMPATIBLE) $56.43
Intermediate Transfer Belt (ITB) assembly $361.67
RSTRD RG5-5120-140CN $308.66
JetDirect 600N EIO internal print server 10Base-T, 10BASE-2, and LocalTalk LAN interface board - Has one RJ-45, BNC, and 8-pin DIN connector $100.00
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
Yellow toner cartridge - For sale in europe ONLY $181.54
Black toner cartridge $131.20
Face-down delivery asembly - Delivers media from fuser to top face-down output bin $13.81
Fusing assembly (120V, 60Hz operation) - Bonds toner to paper by heat $332.50
Fusing assembly (240v,50Hz) - Bonds toner to paper by heat $335.00
Fuser kit - Contains fuser assembly, one separation roller, three feed rollers, both air filters, hand wipe and installation guide - 110/120 VAC $306.95
Cyan toner cartridge - Contains toner and developer $124.64
Photoconductive drum cartridge kit - Photosensitive drum and waste toner collection reservoir assembly - Transfers image colors to itermediate transfer belt $95.00
Transfer kit - Contains intermediate transfer belt, secondary transfer roller, both air filters and toner cloth $241.60
Fuser kit - Contains fuser assembly, one separation roller, three pickup rollers, both air filters, and a cleaning cloth - 110/120 volt $267.20
Fusing assembly (240v, 50Hz operation) - Bonds the toner to the paper with heat $299.40
Transfer kit - Contains Itermediate Transfer Belt, secondary transfer roller, both air filters and toner cloth $270.30
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
EIO 20 GB DISK DRIVE up to 40 GB DISK DRIVE EIO hard drive $320.00
JetDirect 615N internal print server LAN interface board - 10Base-T and 100Base-TX - Plugs into peripheral EIO slot, has RJ-45 connector. $145.00
HP JetDirect 620n internal print server - 10BaseT and 100BaseTX LAN interface board - Plugs into peripheral EIO slot - Has an RJ-45 connector $305.00
Yellow toner cartridge $191.62
Cyan toner cartridge $191.62
Cyan toner cartridge - For sale in Europe ONLY $181.54
Fuser kit - Contains fuser assembly, two separation/two pickup rollers and both air filters - 220/240 VAC $342.00
Transfer kit - Contains Itermediate Transfer Belt, secondary transfer roller, both air filters and toner cloth $303.00
Fusing assembly (240v,50Hz) - Bonds toner to paper by heat $335.00

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