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How to Identify and Fix Common Problems ?

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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.
These types of lines are typically caused by dirt or white out (correction fluid) on the scanner unit, or one of the corona wires for printing is dirty. This problem is usually resolved by cleaning the scanner glass, scanner glass strip and white plastic bar with a soft lint-free cloth, or cleaning the corona wires.
The drivers of your monitor are outdated, which causes flickering or stripes. Updating these drivers is a simple and efficient solution. Go to `Device Manager` via `Settings` or the search bar and click `Monitors` Select and double-click the monitor with the issue and go to the tab `Driver`.
Often, when there are lines or shading on your print job, the print cartridge could be the reason. When the print cartridge is not being effectively cleaned off, it creates streaks or shading on the document.
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.
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.
Typically, this issue is caused by wet ink or some other substance transferred from a piece of paper as it goes through the ADF. The ink or other substance gets on the glass as the paper moves through, and blocks the light of the scanner in that area for future copies.
Typically, this issue is caused by wet ink or some other substance transferred from a piece of paper as it goes through the ADF. The ink or other substance gets on the glass as the paper moves through, and blocks the light of the scanner in that area for future copies.
noun. (in a cathode-ray or television tube) a single horizontal trace made by the electron beam in one traversal of the fluorescent screen.: Compare frame (def.
The main reason for computer vertical lines may be the outdated or incompatible graphics card driver. To fix this issue, it is quite easy and you only need to update the driver. Just go to the official website of the manufacturer of your computer`s graphics card.
Try using a different HDMI or DisplayPort cable, and power cable to connect your monitor to your PC. Update your graphics drivers. If your graphics drivers are outdated, there may be a compatibility issue causing the vertical lines. Update your graphics drivers to see if it resolves the issue.
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.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

My 2550n Color LaserJet does not want to print in color
ANSWER : That model had issues with the carousel solenoid sticking. That might explain why it works after you let it sit for 10 minutes. The solenoid gets hotter with use which causes the deteriorated foam on it to become sticky and hold down the release plate instead of letting it go. This allows the carousel to spin when it is supposed to stop for each color. The solenoid is located on the right side of the printer. If you open the lid, it is just behind the opening at the top right. You need to remove the top of the printer and scrape off the goo on top of the solenoid body. I put a piece of thin sticky backed felt to replace it. Other people use electrical tape.

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HP Color Laserjet 3800 problem when printing color
ANSWER : Do a cold reset

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HP LaserJet 500 Color MFP M575 Scanner Calibration
ANSWER : 0512 is service code for m575

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HP 4700 Color alignment
ANSWER : Thanks much, this method worked for me.

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Need help for Epson Stylus color 3000 print head?
ANSWER : I need help changing the print head in my Epson 3000 – I have 2 printers – one will not stay in alignment and the other black ink is plugged and I have soaked it and cannot get it to budge.

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Reset HP Color Laserjet 4700 transfer kit
ANSWER : How about the situation when resistor does not reset the transfer belt count and even new transfer belt out of the box is not doing it. Do you have any idea how to solve this problem? I did reset transfer belts and fusing units on several HL 4700 printers with no problem but also I came across few which were not possible to reset even with oryginal parts.

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color is not printing true
ANSWER : I changed all toners and drum and it is still doing it.

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HP Color Laserjet 500 series M551n Error 98.00.0C
ANSWER : I just ran into one of these on a 4 year old m551. Failed to complete startup at the end of disk check. Followed the above link for troubleshooting.

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