HP Color LaserJet 4550

How to Identify and Fix Common Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

Prints that appear more green are commonly caused by an absence of magenta ink/toner being put to paper by your printer. In addition to your prints looking “greener” you may also notice yellow and blue areas appear almost neon due to the the magenta not being able to give them more realistic tones.
This is most often caused by using paper that is damp, is of poor quality, or not designed for this machine (ie: Inkjet paper) It can also be caused by the machine not being placed on a solid, level surface, poor calibration, or uneven distribution from a low toner cartridge.
Dots are typically caused by foreign material inside the machine (for example paper dust, glue from labels or envelopes, paper clips, staples) sticking to or damaging the surface of the drum. Toner builds up on or sticks to these areas on the drum and creates black dots on the printed pages.
Lines or streaks always appear in printouts when the cartridges begin to run out of ink. Replace print cartridges that are out of ink or low on ink.
Light bar pulses light green

See the Wi-Fi light on the control panel to understand the Wi-Fi connection status. This occurs when the printer is turning on or off, or updating.

Ink Cartridge Settings

The cyan and yellow ink cartridges work together to create green in prints. As there isn`t a dedicated green cartridge, you must disable either yellow or cyan to reduce green. After clicking on the “Ink Cartridge Settings” button, you can deselect the “Cyan” or “Yellow” ink cartridge.

Blotchy, Streaked or Faded Printouts

Then check your toner. Cause: If you seldom print documents, your toner might have settled and would need to be “awakened.” Cure: Remove your toner and gently rock it from side to side — DON`T shake the toner. Make sure you don`t touch the toner roll as it may leave fingerprints.

Faint, streaky or spotty prints are all common signs of a clog but a simple cleaning can usually get your HP ink cartridges working again. Printheads clog due to infrequent cartridge use. If you regularly go a few weeks without printing, your cartridges will eventually dry out and need to be replaced.
Smears that appear in addition to otherwise well-formed output may signal toner contamination inside your LaserJet, either from a leaky cartridge or from improperly fused sheets that leave toner residue behind. Smears at the edge of the sheet that enters the printer first point to dirty paper guides.
Streaks and unwanted lines could mean that the printer heads are out of alignment. There`s an alignment tool in the printer`s control panel. If that`s not the issue then the printer is dirty. Printer ink stripes may appear along the edges of the paper, which means there`s ink on the rollers and other parts.
A printer printing lines on the page are normally caused by a blocked, dirty, or damaged print head. Blocked ink cartridge nozzles, or not removing protective seals correctly when you installed a new ink cartridge can also cause missing lines of print.
Check for issues with the ink cartridges

Very low ink levels, using non-HP cartridges, and rough handling can cause print quality issues. Replace any non-HP or refilled cartridges with genuine HP cartridges. HP supplies are available from the HP Store and local retailers.

Enable or disable EconoMode in any of these ways: At the product control panel, select the CONFIGURE DEVICE menu, and then select the PRINT QUALITY submenu. EconoMode is turned off by default. In the embedded Web server, open the Settings tab and select the Configure Device option.
Check for issues with the ink cartridges

Very low ink levels, using non-HP cartridges, and rough handling can cause print quality issues. Replace any non-HP or refilled cartridges with genuine HP cartridges. HP supplies are available from the HP Store and local retailers.

Enable or disable EconoMode in any of these ways: At the product control panel, select the CONFIGURE DEVICE menu, and then select the PRINT QUALITY submenu. EconoMode is turned off by default. In the embedded Web server, open the Settings tab and select the Configure Device option.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP Color LaserJet 4550 Streaking
ANSWER : hello,

Read Full Q/A … :

HP Color LaserJet 4550

HP Color Laserjet 3800 problem when printing color
ANSWER : Do a cold reset

Read Full Q/A … :

HP Color LaserJet 4550

HP Color Laserjet 2840 spitting out blanks
ANSWER : Moe- You are the man!

Read Full Q/A … :

HP Color LaserJet 4550

Reset HP Color Laserjet 4700 transfer kit
ANSWER : How about the situation when resistor does not reset the transfer belt count and even new transfer belt out of the box is not doing it. Do you have any idea how to solve this problem? I did reset transfer belts and fusing units on several HL 4700 printers with no problem but also I came across few which were not possible to reset even with oryginal parts.

Read Full Q/A … :

HP Color LaserJet 4550

My 2550n Color LaserJet does not want to print in color
ANSWER : That model had issues with the carousel solenoid sticking. That might explain why it works after you let it sit for 10 minutes. The solenoid gets hotter with use which causes the deteriorated foam on it to become sticky and hold down the release plate instead of letting it go. This allows the carousel to spin when it is supposed to stop for each color. The solenoid is located on the right side of the printer. If you open the lid, it is just behind the opening at the top right. You need to remove the top of the printer and scrape off the goo on top of the solenoid body. I put a piece of thin sticky backed felt to replace it. Other people use electrical tape.

Read Full Q/A … :

HP Color LaserJet 4550

HP Color Laserjet blank pages – only jetdirect page
ANSWER : What about the engine test? To do that, drop down the front tray. Feel around on the left side at the top and you’ll feel a little plastic dongle. If you lift up on that it will initiate an engine test page. That will be a page containing lines of each color.

Read Full Q/A … :

HP Color LaserJet 4550

HELP! HP Color Laserjet 5500dn (formatter prob??)
ANSWER : Italiano:

Read Full Q/A … :

HP Color LaserJet 4550

HP Color LaserJet 4700
ANSWER : Saludos Amigo le Que le Pasa a tu Impresora Es Que Tienes rota El Sistema de sierre de la puerta con el Cierre de los tóner es Por Esa Razon Que No Cierra los tóner Si Quieres repararla Ponte en Contacto Madrid Seis Cinco Cinco Tres Cuarenta dos cuarenta y uno Reparación en el Momento saludos

Read Full Q/A … :

HP Color LaserJet 4550