Unknown Printer

How to Identify and Fix Common Problems ?

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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.
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.
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.
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.
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.
A cartridge may be running out of ink even if the graphic shows ink remaining (see the note at the start of this section). 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.
Paper Jams

This is a common laser printer problem. Primary causes include grime, dust, worn rollers, or incorrect paper weight. The most basic way to prevent paper jams is simply through regular cleaning of your printer. Also, replace parts as needed.

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.
Dirty or misaligned print heads

Your printer may be printing fuzzy, blurry, or other faint text because of dirty print heads. All modern printers have a self-cleaning mode, which cleans the print heads, and additional internal equipment used in the printing process.

Streaks on your print jobs are a result of your copier glass being dirty. “Dirt” is created by fingerprints, dust, and other forms collected through usage. Often this will be detected by your device before streaks begin to appear, and a display will read that the glass needs to be cleaned.
There are four primary causes for horizontal banding on prints from inkjet printers, (1) nozzle clogs, (2) mis-aligned print heads, (3) low quality print settings (4) incorrect paper thickness settings. Below we will describe each of these causes for horizontal banding as well as ways to try and fix them.
As with other tools, our laser systems require some maintenance to ensure it works optimally. For instance, failing to maintain the laser solution can cause overheating — which can be catastrophic.
Laser printers don`t suffer from the same performance issue as inkjet printers when left idle for significant periods of time. Inkjet printers often get clogged up with dried out ink when not in regular use. Keeping them maintained requires careful cleaning.
Why is it important to clean a laser printer? Printing is vital to all businesses so ensuring your laser printer is thoroughly cleaned is crucial as it allows your machine to continue working efficiently. Cleaning a laser printer is easy with the correct equipment, however they are prone to dust and debris.
Buying extra drums for your office laser printer saves money and time, but the components do have a shelf life. Shelf life is a period of time the components can be stored and still be suitable for use. A laser printer drum`s shelf life is approximately two years if the drum is still in its protective bag.
Vertical Streaks or Lines

Swapping out the cartridge for another should help you rule it out as the culprit. Vertical white lines also can signal an obstruction that prevents the laser from imaging pages correctly. Resolving that problem can require cleaning elements of the laser assembly or replacing it altogether.

Regular washing and waxing helps to remove Black Streaks before they get good and stuck. A good regular wax job helps to prevent Black Streaks in the first place. A good layer of wax will help to minimize the way Black Streaks set into the surface. Waxing creates a physical barrier across the surface.
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.
Some of the most common printer problems that most of us have experienced include paper jamming, slow printing, uneven printing, and wrong colour output. If you use your printer frequently, we know how annoying it can be to have persisting problems with the printer.
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.
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.
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.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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 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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Left side light printing
ANSWER : A possibility could be the Charge Transfer Roller mount on the left side broke and it’s not lifting up to push the paper up to the cartridge drum. Take the cartridge out and push down on each end and see if they respond in the same way.

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HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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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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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 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 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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