HP LaserJet 4V

How to Identify and Fix Common Problems ?

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

Slightly lift up the rear-door rib assembly, and then carefully slide the cover away from the printer to remove it. Remove 1 screw (callout 1 in picture below). Slightly lift up on the cover, and rotate the top of the cover away from the printer. Remove the left cover.
Use a sharp, thin tool to do this, such as a Swiss army knife or utility knife. Slide the blade of the knife under one of the plastic tabs. Gently pry up. Repeat to remove the other plastic tab.
Use a sharp, thin tool to do this, such as a Swiss army knife or utility knife. Slide the blade of the knife under one of the plastic tabs. Gently pry up. Repeat to remove the other plastic tab.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Good toner cartridges still available for HP LJ 4V?
ANSWER : Try directpreciseimaging.Com in Calif. Don’t worry about resistance unless there is none.

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HP LaserJet 4V

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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HP LaserJet 4V

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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HP LaserJet 4V

HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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HP LaserJet 4V

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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HP LaserJet 4V

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 4V

HP laser jet 3015 "Upgrade Error Call HP Support"
ANSWER : rgtr

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HP LaserJet 4V

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

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HP LaserJet 4V