Unknown Printer

How to Identify and Fix Common Problems ?

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

Stop sharing your printer with other users on the network.

Fortunately, it`s easy to disable printer sharing in your settings. Windows: In the Control Panel, click Network and Internet and then Network and Sharing Center. Click Change advanced sharing settings and then choose Turn off file and printer sharing.

Check for obstructions in the carriage path

Open the cartridge access door to get to the carriage inside the printer. Make sure the carriage is not obstructed by gently sliding the carriage side to side. Look for and remove any obstructions in the carriage path, such as crumpled paper or dislodged labels.

Smears and smudges on the paper can be caused by dirt, dust, or toner accumulated on the rollers or transfer belt as it passes through the paper. Cleaning your printer, particularly the rollers, is one of the options for removing black markings from paper.
Open the start menu and select Control Panel > Administrative Tools > and choose the Services icon. Locate the Print Spooler service and right-click. Then select the option to “Stop” the service.
Check Cables and Printer USB Ports

Check all cable connections (including the power cord) on the printer side. If the printer does have power and you`ve properly connected the communication cable, but the printer is still not recognized, try switching to a different USB port on the PC.

The E3 error code indicates the unit has detected there is no refrigerant. The unit will require a repair service for refrigerant to be added, please visit Request a Repair page for further assistance.
Turn the product on while you press and hold the Resume button for 10-20 seconds. The Attention light turns on. Release the Resume button. The Attention and Ready lights cycle while the product restores factory defaults.
The printer is either low in toner, the density is set too low, or the Economode may be turned on. Remove the toner cartridge and shake it. This will redistribute the toner and often will temporarily solve the problem. However, this usually indicates it is time to install a new cartridge.
Reset. Resetting the printer stops printing and clears the current print job received from the active interface. You may want to reset the printer when there is a problem with the print job itself and the printer cannot print successfully.
A printing defect characterized by a blurry and unclear printed image, caused by a wide variety of press and handling conditions.
In Windows, go to Printer Properties > Maintenance > Clean Heads > OK and follow on-screen prompts. On a Mac, check the Applications folder for a Utility application for the printer. To manually clean the printer, remove printheads and use equal parts water and isopropyl alcohol to clean them.
Make sure the printer platen is not dirty with ink. Unplug the machine from the AC power outlet. Lift the scanner cover until it locks securely in the open position. Clean the machine`s printer platen(1) and the area around it, wiping off any scattered ink with a soft, dry, lint-free cloth.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

evenly spaced horizontal lines on hp laserjet III printout
ANSWER : The lines would be a toner cartridge problem. Which paper tray? The MF tray or the optional paper cassette?

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How to copy a card slot in HP laserjet 4250N
ANSWER : None that I know of, using a computer is likely your best option but I never attempted it.

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LaserJet 4 won't Power Up
ANSWER : I haven’t seen that particular behavior on that model. It either works or it doesn’t. My first choice would be the power supply.

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HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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HP Laserjet M3035xs RFU Upgrade
ANSWER : There’s no way.

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What repair needs to be done for a "50 needs repair" message on an HP Laserjet IIIP?
ANSWER : I don’t know what you mean by good toner cartridges. They haven’t been built in about 10 years, so if they are new OEMs in the box, they are guaranteed to fail. The 50 error on that printer is mostly a burned out fuser lamp. This site was sold, so as you can see, there are no more kits available.

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HP Laserjet 4200 50.2 Fuser error
ANSWER : if you are using a good fuser the next part to try would be low voltage power supply

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LaserJet 2200d Stopped Working
ANSWER : I am able to print a demo page and no lights blinking, tried different slots to no avail

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Unknown Printer