HP LaserJet 4

How to Identify and Fix Common Problems ?

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Paper pushed too far into the input tray when it is loaded, might feed into the printer incorrectly, causing the paper to tear. Paper stacks loaded into the input tray with too many or too few sheets of paper, might feed into the printer incorrectly, causing the paper to tear.
Creases and folds in the paper are normally due to one of the following conditions: The paper is not correctly loaded in the paper tray. You are printing on a special type of paper or other media. The paper has absorbed too much moisture from the surrounding air.
The streaks or lines might be caused due to low ink levels in one or both ink cartridges. Check the ink levels using the HP Toolbox to determine if the ink cartridges are low on ink and need to be replaced. note: Ink level warnings and indicators provide estimates for planning purposes only.
Streaking is usually caused by a worn out drum unit or spent toner cartridge. Drum units are a consumable and only need to be replaced after the use of 3 or 4 toners. Not all printers use a separate toner and drum unit.
Hold a steam iron about 6 inches from the back of the creased area and move it back and forth until you start to see steam. Then, gently press down on the crease with your hand to help smooth it out. Just be careful not to get the iron too close, as too much heat can damage the canvas.
Plug in the iron to a low setting without steam. Smooth a white sheet or thin ironable cloth over the poster. Iron the creased area of the poster by moving the iron back and forth over the sheet in the appropriate area.
If you notice white or dark lines in your prints (also called banding), try these solutions before you reprint: Run a nozzle check to see if any of the print head nozzles are clogged. Then clean the print head, if necessary. Make sure the paper type setting matches the type of paper you loaded.
When your printer leaves black lines, the lines indicate that there are excess toner powders on the rollers or transfer belt within the printer. As the paper is moved along by the rollers and transfer belt, any excess powder left on them can result in lines being left on the paper.
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.
Paper curl is caused by excess humidity in the paper. When paper passes through the fuser, the combination of heat and pressure required to bond toner to the paper also causes curling because of excess moisture in the paper. All laser printer are susceptible to this.
What`s happening is that the drum or rollers could have a fingerprint or dirt that is smudging the toner on the page as it passes through to the fuser. It is normally caused by the rollers. If the marks are always in different places, then it`s most likely to be the drum.
Iron the paper.

You can use the same technique that you would if you were ironing clothing. Move the iron over the cloth-covered paper in small circular motions, making sure that you don`t let it linger in any one spot for too long. Every so often, stop, lift the cloth, and check to see if the wrinkles are gone.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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 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

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 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

Paper Mismatch Error on HP C6150, C6180 or C7280
ANSWER : Thanks a lot for your informational post. I had been working online and making money through paypal generator if you also want to know the secrets behind what you can do with this free paypal money adder visit the website and take away cash in your account.

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HP LaserJet 4

Paper Jam 13
ANSWER : Sticky paper pickup solenoid. Since MF tray doesn’t use it, it works fine. Solenoid is located on right side of printer at the end of the paper pickup roller shaft. You need to remove the solenoid, take the plate and spring off the top and then scrape off the gooey residue that’s causing it to stick. Then you get a thin piece of sticky backed felt and put it on top of the metal base. You can find some at the local hardware store, they’re used on the bottom of chair legs.

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HP LaserJet 4

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

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HP LaserJet 4

HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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HP LaserJet 4