HP LaserJet 4

How to Identify and Fix Common Problems ?

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

HP has determined that 99% of all lines and streaks on copies made by feeding the original documents through the ADF are caused by debris on the ADF glass. Debris can include dust, paper or toner dust, residue from sticky note adhesive, correction fluid or tape, ink, fingerprints, and more.
Vertical lines in prints are an early warning sign of a low ink cartridge, which may show up before the printer`s low ink alerts start. You can fix the problem by replacing the low cartridge. Gently shaking the drained cartridge a bit may help to get another few prints out of it without vertical lines.
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.
Vertical Streaks or Lines

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.

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 vertical line is always a line that runs from top to bottom, or, from bottom to top. Standing lines are also a type of vertical line that runs vertically. We usually draw vertical lines between the bases of a trapezoid or a parallelogram….
Run the Alignment Tool

Your printer could be printing blurry text due to a misaligned print head. You can give this a check by running the printer`s integrated alignment tool. This tool should be accessible via the printer`s system settings, either on the printer itself or via the printer`s driver software.

Vertical lines lead the eye upward creating the illusion of height to visually slen- derize the figure. Horizontal lines usually carry the eye across. Diagonal lines slant, and because of the slant are incredibly slimming and like ver- tical lines, no matter where you place them on your body will slim that area.
Vertical lines accentuate height and convey a lack of movement, which is usually seen as horizontal. They stretch from the earth to the heavens and are often connected with religious feelings. Their tallness and formality may give the impression of dignity.
Preview your settings page

After you upload your app, your SettingsView renders on the app settings page in the Dashboard. To see it live, go to https://dashboard.stripe.com/settings/apps/YOUR_APPLICATION_ID and replace YOUR_APPLICATION_ID with the ID you specified when creating your app.

Click: `Open the HP Photosmart Toolbox` or: `Service this device` Click: Device Services tab. Click: Calibrate the Device or Clean the Print Cartridges or Align the printer. Follow the instruction which will appear on-screen.
The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. It has the appearance of an equals sign ⟨=⟩ sign with a third line. This article contains special characters.
In a coordinate plane, a line parallel to the Y-axis is called Vertical Line. It is a straight line which goes from top to bottom and bottom to top. Any point in this line will have the same value for the x-coordinate.
Straight lines are vertical if they go straight up and down, or top to bottom, without going across at all. Lines are slanting if they don`t go straight across or straight up. They look like a slope and go both up and down, and across too.
Open the Devices and Printers folder, right-click the HP printer, and then select Properties. Click the Device Settings tab. In the Installable Options section, set Printer Status Notification to either Enable or Disable. Click OK.
This happens when the rollers or the transfer belt inside the printer get dirty or covered in excess dirt, ink or toner powder, and as the paper is moved through the printer the `tracks` are being left on the page. This is normally the case when the tracks on the page are located at either end.
Open the Devices and Printers folder, right-click the HP printer, and then select Properties. Click the Device Settings tab. In the Installable Options section, set Printer Status Notification to either Enable or Disable. Click OK.
This happens when the rollers or the transfer belt inside the printer get dirty or covered in excess dirt, ink or toner powder, and as the paper is moved through the printer the `tracks` are being left on the page. This is normally the case when the tracks on the page are located at either end.
Open the Devices and Printers folder, right-click the HP printer, and then select Properties. Click the Device Settings tab. In the Installable Options section, set Printer Status Notification to either Enable or Disable. Click OK.
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.
This happens when the rollers or the transfer belt inside the printer get dirty or covered in excess dirt, ink or toner powder, and as the paper is moved through the printer the `tracks` are being left on the page. This is normally the case when the tracks on the page are located at either end.
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.

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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HP LaserJet 4

HP CM2320fxi – Groaning / Vertical Lines
ANSWER : Sounds like you need a monochrome laser printer. I know you want to keep what you already have but it just doesn’t make sense to have to deal with a machine that is meant to provide color printing when you only want black and white printing. Chuck the color laser and get a black and white printer. It will save you money and headaches in the long run.

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HP LaserJet 4

HP 26 vs HP 29 cartridge compatibility
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HP LaserJet 4

vertical lines
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HP LaserJet 4

vertical lines in the print
ANSWER : Looks like a bad wiper blade in the toner cartridge. They are rubber and with age. Their function is to clean off residue toner on the drum, similar to a windshield wiper blade cleaning off rain drops.

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HP LaserJet 4

Vertical lines on paper
ANSWER : You can use Isopropyl Alchol. I would wait until it cooled down first.

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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 9040 MFP Error code
ANSWER : bonsoir

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HP LaserJet 4