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HP officejet pro k550 / alignment problem (white gaps) not solved after linefeed calibration -diagnostic colored blocks normal -diagnostic gray blocks with white gaps -normal quality printing gives white lines in text -best quality printing produces lines with partial double printing

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  • marc_de_kimp Apr 13, 2011

    You referred to the HP help side. This is first help and i hoped for expert help.
    Thanks anyway

  • marc_de_kimp Apr 13, 2011

    In the reply i recieved, they referred to the HP help side. This is first help everybody is able to find. I hoped for expert help.
    Many thanks,
    mdk

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2 Answers

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Looks like the the black/yellow print head is clogged

Cleaning the print head using a moistened cotton may not be the exact solution because its just the first remedy when encountering this problem.

Take out the print head and soaked it to water with ammonia solution. Leave it overnight. You can also use canned air to blow the small tube in the print head to unclogged once you have taken it out from the water with ammonia.


Let me know how it goes...

Posted on Apr 13, 2011

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Please click on the link below:
>Troubleshooting Print Quality Issues

Posted on Apr 11, 2011

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White Lines HP Officejet Pro L7780


Have you replaced the ink? Perhaps one color is low or one of the pin-heads is broken. If the pins on the printer have broken you will need a repair technician or just buy a new printer.

Feb 07, 2014 | Lexmark X5470 All-In-One InkJet Printer

1 Answer

We have been getting white horizontal lines on our documents. Both print heads were recently replaced and that did not solve the problem. What part is needing replaced?


I had this same problem and none of the printer services (clean printhead, align printer, calibrate linefeed) fixed the problem. After trying every solution that I found on the internet with no success I was able to fix the problem by cleaning two critical parts of the printer.
1. Turn off the printer and open it as though you are going to change the printheads.
2. Towards the back of the printer you will see a thin clear plastic ribbon that has very small black lines on it. Very, very, very gently clean this ribbon. I used a lint free cloth and some glass cleaner. Spray the cleaner on the cloth and slide the cloth against both sides of the ribbon. Do not pull on the ribbon. This ribbon is used to tell the printhead how far it has moved from side to side.
3. Next locate the silver bar that runs across the back of the printer. This bar is used to feed the paper through the printer as it is printing a document. On the left side of the bar you will see some plastic guides that hold the bar in place. On the outside of the plastic guides you should see a clear plastic disc made of the same material as the ribbon above. This disc also has very small black lines on it. Again very, very, very gently clean this plastic disc. This disk is used to tell the printheads how far it has travelled down the page. This is the one that was causing the problem. The dust or dried ink or whatever was on the disc was causing the printer to incorrectly calibrate the linefeed and was causing the white lines to appear on my documents.
4. Use the "calibrate linefeed" function of the printer services to recalibrate the linefeed and the white lines will hopefully be gone.

Jul 26, 2011 | HP Officejet Pro L7780 All-In-One InkJet...

2 Answers

K5400 warning lights indicated print head problems. I have cleaned the print heads and reinstalled them and I am back in business but now it's doing a test print on every occasion.


Try doing an alignment with the printheads.
You can also try changing the inks,if that solves the problem eventhough old inks are stil not empty,contacts might be the issue on old inks which causes error blinking lights which is an indication of printhead rejection.

Method one: Clean printheads in Solution Center
  1. Make sure the printer is loaded with unused white paper.
  2. In HP Solution Center , click Settings , and then click Printer Toolbox .
  3. Select the Services tab, and then click Clean Printheads .

Method two: Clean printheads from the control panel
  1. Make sure the printer is loaded with unused white paper.
  2. Press and hold the Power button
  3. Press the Cancel button two times.
  4. Press the Resume button one time.
  5. Release the Power button
    Cleaning the printheads takes a few minutes, and when it completes, a page prints.

Method one: Calibrate linefeed in Solution Center
  1. Make sure the printer is loaded with unused white paper.
  2. Open HP Solution Center , then click Settings , then Printer Toolbox .
  3. Select the Services tab.
  4. Click Calibrate Linefeed .
  5. An Advance Linefeed Calibration window opens. Click OK .
  6. After calibration, print another PQ Diagnostic. If there are still dark lines or white gaps in Test Pattern 3, the printer must be serviced.
Method two: Calibrate linefeed from the control panel
  1. Press and hold the Power button
  2. Press the Cancel button fourteen times.
  3. Press the Resume button six times.
  4. Release the Power button
Your's Truly,

Christian from HP

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(Although I am employed by HP, I am speaking for myself and not for HP)

Apr 10, 2011 | HP OfficeJet Pro K5400dn Photo Printer

1 Answer

Printer full of ink, but will pring pages either blank of with smeared ink.


Follow these steps to check the print settings for your print job.
  1. In the software program you are trying to print from, click File and then click Print . The Print dialog box opens.
  2. Select your product, and then click Properties . The printer Properties dialog box opens.
  3. Click the Printing shortcuts tab.
  4. Under Printing shortcuts , click the type of job you are trying to print.
  5. Review the following options, and then make any necessary changes.
    • Paper size : Make sure that the selected option matches your paper size.
    • Paper type : If one of the options matches your paper type exactly, select that option.
    • Print quality : If you are not satisfied with your printed page quality, or want more densely printed prints, increase the print quality. To print more quickly, or for lighter prints, decrease the print quality.
  6. Click the Features tab.
  7. Check the Print in Grayscale setting
    • If you are trying to print in color, select Color Options , and then make sure that Print in Grayscale is not selected.
    • If you are printing a black and white image, select Print in Grayscale to fix streaking in black areas.
  8. Click OK , and then click OK again to start the print job.
Make sure the printer is loaded with unused white paper.
Open HP Solution Center , then click Settings , then Printer Toolbox .
Select the Services tab.
Click Print PQ (print quality) Diagnostic Page .

Make sure the printer is loaded with unused white paper.
Open HP Solution Center , then click Settings , then Printer Toolbox .
Select the Services tab, then click A- Click Align Printheads or
B- Click Clean Printheads .
C- Click Calibrate Linefeed .

If, after repeated printhead cleaning, the Print Quality Diagnostic page shows white lines across the color blocks in Test Pattern 2 (but no white lines in the gray blocks in Test Pattern 3), one or both of the printheads will have to be replaced. The Print Quality Diagnostic page shows which printhead should be replaced.









Try using the HP Scan Diagnostic Utility in Windows - HP Customer Care (United States - English)

Nov 16, 2010 | HP Officejet Pro L7780 All-In-One InkJet...

2 Answers

Officejet Pro K550 text prints grey instead of black


go to the printer control panel, right click your printer and open preference or may be properties on your end, Click the Color tab, and change the color option to black or color. hope this helps. feel free to rate how helpful it is.

Oct 07, 2010 | HP OfficeJet Pro k550 Printer

1 Answer

On my Test Pattern 2 the blue/light blue and green/yeallow have steeks in it. The documents that I print have streaks going across the page. I've cleaned everythign I can clean. The printer has 6,251...


SolutionFollow the given steps in the order presented to resolve the issue: Step one: Retry the print jobThe problem may occur only rarely. If you have not seen it in other printouts, try again. Step two: Increase the print quality modeIf reprinting did not help, try increasing the print quality mode.
  1. In the application you are printing from, click File , and then click Print .
  2. Make sure the printer is selected, and then click Properties .
  3. Select the Paper/Quality tab.
  4. In the Print Quality area, choose the next higher quality setting. If the current setting is Draft, choose Normal. If the current setting is Normal, choose Best.
Step three: Print in grayscale (black area streaking only) If the streaks are in a black area of a black and white printout, change to grayscale printing.
NOTE: This step does not apply to color printouts.
  1. In the application you are printing from, click File , and then click Print .
  2. Make sure the printer is selected and click Properties .
  3. Click the Color tab, and select Print Grayscale and High Quality .
Step four: Clean the printheadsIf the print quality is still bad, clean the printheads.
  1. Make sure the printer is loaded with unused white paper.
  2. Open HP Solution Center .
  3. Click Settings , Print Settings , and then select Printer Toolbox .
  4. Click the Service Tab .
  5. Click Clean Printhead , and then click Clean .
Step five: Align the printheads If the print quality is still bad, align the printheads.
  1. Make sure the printer is loaded with unused white paper.
  2. Open the printer Toolbox , and select the Printer Services tab.
  3. Click Align Printheads . The Align Printheads window opens. Click Align .
  4. The printer prints an alignment page. The lines in the patterns should appear to be straight. Click OK when the page finishes printing.
Step six: Calibrate the linefeed If the print quality is still bad, calibrate the linefeed:
  1. Make sure the printer is loaded with unused white paper.
  2. Open the printer Toolbox and select the Printer Services tab.
  3. Click Calibrate Advanced Linefeed . The Advanced Linefeed Calibration window opens. Click OK .
Step seven: Replace one or both printheads If the print quality is still bad after performing all the above steps, one or both of the printheads will have to be replaced. Print a PQ Diagnostic page to see which printhead should be replaced.
  1. Make sure the printer is loaded with unused white paper.
  2. Press the Setup button.
  3. Press 1 and * simultaneously.
  4. Look at the color blocks labeled Test Pattern 2. Some or all of them could show white horizontal streaks. If none of the blocks are streaked, the printheads are okay.
    • If the Black block has lines – replace the KY printhead.
    • If the Cyan block has lines – replace the MC printhead.
    • If the Magenta block has lines – replace the MC printhead.
    • If the Red block has lines – replace the KY printhead.
    • If the Green block has lines – replace the KY printhead.

Dec 21, 2009 | HP OfficeJet Pro L7580 InkJet Printer

1 Answer

Streaks though the pages


Step one: Retry the print job The problem may occur only rarely. If you have not seen it in other printouts, try again. Step two: Increase the print quality mode If reprinting did not help, try increasing the print quality mode.
  1. In the application you are printing from, click File , and then click Print .
  2. Make sure the printer is selected, and then click Properties .
  3. Select the Paper/Quality tab.
  4. In the Print Quality area, choose the next higher quality setting. If the current setting is Draft, choose Normal. If the current setting is Normal, choose Best.
Step three: Print in grayscale (black area streaking only) If the streaks are in a black area of a black and white printout, change to grayscale printing. NOTE: This step does not apply to color printouts.
  1. In the application you are printing from, click File , and then click Print .
  2. Make sure the printer is selected and click Properties .
  3. Click the Color tab, and select Print Grayscale and High Quality .
Step four: Clean the printheads If the print quality is still bad, clean the printheads.
  1. Make sure the printer is loaded with unused white paper.
  2. Open HP Solution Center .
  3. Click Settings , Print Settings , and then select Printer Toolbox .
  4. Click the Service Tab .
  5. Click Clean Printhead , and then click Clean .
Step five: Align the printheads If the print quality is still bad, align the printheads.
  1. Make sure the printer is loaded with unused white paper.
  2. Open the printer Toolbox , and select the Printer Services tab.
  3. Click Align Printheads . The Align Printheads window opens. Click Align .
  4. The printer prints an alignment page. The lines in the patterns should appear to be straight. Click OK when the page finishes printing.
Step six: Calibrate the linefeed If the print quality is still bad, calibrate the linefeed:
  1. Make sure the printer is loaded with unused white paper.
  2. Open the printer Toolbox and select the Printer Services tab.
  3. Click Calibrate Advanced Linefeed . The Advanced Linefeed Calibration window opens. Click OK .
Step seven: Replace one or both printheads If the print quality is still bad after performing all the above steps, one or both of the printheads will have to be replaced. Print a PQ Diagnostic page to see which printhead should be replaced.
  1. Make sure the printer is loaded with unused white paper.
  2. Press the Setup button.
  3. Press 1 and * simultaneously.
  4. Look at the color blocks labeled Test Pattern 2. Some or all of them could show white horizontal streaks. If none of the blocks are streaked, the printheads are okay.
    • If the Black block has lines – replace the KY printhead.
    • If the Cyan block has lines – replace the MC printhead.
    • If the Magenta block has lines – replace the MC printhead.
    • If the Red block has lines – replace the KY printhead.
    • If the Green block has lines – replace the KY printhead.

Nov 25, 2008 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

HP L7680 Printer Head Problem


Normal 0 false false false MicrosoftInternetExplorer4 st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Step two: Increase the print quality mode
If reprinting did not help, try increasing the print quality mode.
In the application you are printing from, click File, and then click Print. Make sure the printer is selected, and then click Properties.
Select the Paper/Quality tab. In the Print Quality area, choose the next higher quality setting. If the current setting is Draft, choose Normal. If the current setting is Normal, choose Best.
Step three: Print in grayscale (black area streaking only)
If the streaks are in a black area of a black and white printout, change to grayscale printing.
NOTE:- This step does not apply to color printouts.
In the application you are printing from, click File, and then click Print.
Make sure the printer is selected and click Properties.
Click the Color tab, and select Print Grayscale and High Quality.
Step four: Clean the printheads
If the print quality is still bad, clean the printheads.
Make sure the printer is loaded with unused white paper.
Open HP Solution Center.
Click Settings, Print Settings, and then select Printer Toolbox.
Click the Service Tab.
Click Clean Printhead, and then click Clean.
Step five: Align the printheads
If the print quality is still bad, align the printheads.
Make sure the printer is loaded with unused white paper.
Open the printer Toolbox, and select the Printer Services tab.
Click Align Printheads. The Align Printheads window opens. Click Align.
The printer prints an alignment page. The lines in the patterns should appear to be straight. Click OK when the page finishes printing.
Step six: Calibrate the linefeed
If the print quality is still bad, calibrate the linefeed:
Make sure the printer is loaded with unused white paper.
Open the printer Toolbox and select the Printer Services tab.
Click Calibrate Advanced Linefeed. The Advanced Linefeed Calibration window opens. Click OK .
Step seven: Replace one or both printheads
If the print quality is still bad after performing all the above steps, one or both of the printheads will have to be replaced. Print a PQ Diagnostic page to see which printhead should be replaced.
Make sure the printer is loaded with unused white paper.
Press the Setup button.
Press 1 and * simultaneously.
Look at the color blocks labeled Test Pattern 2. Some or all of them could show white horizontal streaks. If none of the blocks are streaked, the printheads are okay.
If the Black block has lines – replace the KY printhead.
If the Cyan block has lines – replace the MC Printhead.
If the Magenta block has lines – replace the MC Printhead.
If the Red block has lines – replace the KY printhead.
If the Green block has lines – replace the KY printhead.

Nov 08, 2008 | HP Officejet 5610 All-In-One InkJet...

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