HP LaserJet 4

How to Identify and Fix Common Problems ?

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

Insert the stack of paper into the product, and then gently push the paper guides snugly against the paper. Make sure that the paper is fully inserted into the product. Try printing again. If the issue is not resolved, try loading different brands of paper and different types of paper, one type at a time.
The common reasons for this issue are various, for instance, the paper input tray is overloaded, dust or moisture can affect the paper feed or paper pick rollers, the printer driver is old, etc. Thus, the printer cannot detect the paper that has been inserted into the tray.
With dot matrix printers, paper is often feed through pins on a wheel that grab and slowly move paper through the printer. With inkjet and other page printers, paper is fed through the printer with rollers that grab and move the paper through the printer.
Dust, paper fiber, and other debris might accumulate on the pick rollers and cause paper feed issues. To help prevent paper feed issues, clean the rollers inside the printer and in the duplexer (if equipped).
Slide the paper all the way into the printer. The leading edge of the paper will stop at the Paper Drive Roller. Locate the Paper Sensor/OOPs sensor on the right side of the paper path. It can be seen from the top of the printer with the Top Cover open and has red, black, and blue wires attached to it.
First, the laser printer reads the electronic data that makes up the information or image that you want to print and beams this onto a photo-sensitive drum. The information on the drum is then transferred to paper using static electricity to position tiny particles of powdered toner in the correct pattern.
Open the System Setup menu, and then open the Paper Setup menu. Select the tray that you want to configure. Select Paper Type, and then select the desired paper type for the tray. Select Paper Size, and then select the desired paper size for the tray.
Printed paper is output to the output tray on the top of the printer with the printed side facing down. Before printing paper, open the output tray to output the printed paper.
The input tray is the tray on the printer that serves as the paper source. The output bin is a bin on the printer where printed jobs are delivered. Users can use the input-tray and output-bin job attributes to specify a tray name, such as 3-hole and a bin name, such as staple .
The paper has holes along both sides that fit over the sprockets located on the feeder wheel. When the wheel turns, it feeds the paper into the printer. The holes are torn off the paper after the printout is complete. And, yes, printers still use this type of feeder mechanism.
Paper Overloading

Because many desktop inkjet printers are top-loading, it can be easy to overload the tray.

Clean the print head, if necessary. Make sure the paper size, orientation, and layout settings in your printer software are correct. Make sure your document does not contain blank pages. If your printer software has a Preview option, you can check for blank pages before you print and remove them, if necessary.
This is often caused by the fact the pick-up roller is worn out. The layer of rubber around this plastic part overtime gets too smooth, preventing paper from feeding properly into the printer. This fix is not really hard, will take no more than half an hour and costs around 10,- (Euro or Dollar).
Clean the print head, if necessary. Make sure the paper size, orientation, and layout settings in your printer software are correct. Make sure your document does not contain blank pages. If your printer software has a Preview option, you can check for blank pages before you print and remove them, if necessary.
Reasons why your HP printer has ink but won`t print

This may seem obvious, but it sometimes happens: first make sure your paper tray has paper in it. Misalignment, clogged printheads, faulty data communication or insufficient ink levels can also be sources of the problem.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP 4L Printer Paper Jam
ANSWER : The paper jam pointer flashes after the printer sustained the second sheet of paper a couple of centimeters into the machine. The main page in the wake of driving on the printer after some time dependably gets printed, yet it gets stuck at all after pages.

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HP LaserJet 4

HP Laserjet 6MP wont feed paper
ANSWER : I had a similar paper pickup problem on laserjet 6mp. The printer would go through start-up sequence fine but when it received a print job you could here the main gears/rollers turning but no clicking from paper pickup solenoid, then eventually error lights would come one . I incorrectly assumed it was an error with the paper pickup mechanism and wasted a whole day taking the printer apart and replacing the paper pick mechanism. Long story short, if I had bothered to figure out the secondary error light codes from the start, I would have realized it was just a bad fuser and would not have wasted so much time.

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HP LaserJet 4

HP Laserjet 2200, Tray 2 Pickup Problem, Gears Clicking
ANSWER : Definitely not a solenoid problem. I’ve worked on tens of thousands of printers and never replaced a single solenoid. You probably knocked something loose when you installed the pickup roller. Maybe something to do with the gear on the end of the pickup roller shaft. You’ll need to take the gear assembly off to be able to see it.

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HP LaserJet 4

My printer feeds through one piece of paper all the way and then a half piece of paper and stops. I pull out the paper to stop the paper jam and then it prints but sounds rough. After printing, it doesn't feed the paper all the way through.
ANSWER : And the first 2 sheets, the full and half sheet that go through first, are blank.

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HP LaserJet 4

Dead HP 4L
ANSWER : My old HP 4L didn’t power up after I had to shut it down for a couple of weeks. Not lights, no fan … my nice old clunky Laserjet dead?

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HP LaserJet 4

HP LaserJet 1200 Early Feeding Causes Paper Jam
ANSWER : Seriously, dmzcompute, you are awesome! And this is just what the internet does so well: a specific fix for an esoteric problem, thus keeping a 15 year old machine alive another day. Thank you!

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HP LaserJet 4

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

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HP LaserJet 4

HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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HP LaserJet 4