Question about HP PhotoSmart 7550 InkJet Printer

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Hp 7550 ink jet printer printing uneven

I have not had this problem before. My HP 7550 inkjet is printing with faint lines, and there is a discoloration, almost faded out areas when I print. I have cleaded and changed the cartridges. Does anyone know whay this is happening? The printer has been great, and is 6 years old, I am thinking it may just be done?

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My first guess is that it is a cartridge issue, due to these printers having the print head as part of the cartridge, there is nothing else, it makes the whole cartridge the only printing item. Ensure the carts are not old (exp date) and that they are HP, With that all understood as I now see that you must due to owning it for 6 years, then you could try to clean the contacts on machine's "cartridge holder" and give that a clean too while your at it cause it may be the problem here (see below)

If a inkjet printer lasts 3 years you would be doing well, and you've had 6. Exceptional!

HP Photosmart printers may print images with white lines or single color streaks. This issue can be caused by ink that has dried in the ink nozzles or by debris that is blocking the ink nozzles. The ink cartridges and the and printer cradle should be cleaned. Clean the ink cartridges with the ink cartridge cleaning utility in the HP Printer Toolbox. Also, clean the ink cartridges and the print cradle manually.
Cleaning the ink cartridge cradle

  1. Assume an eye level position with the HP Photosmart printer.
  2. Locate the ink cartridge cradle.
  3. Using clean, moistened swabs, wipe the underside of each wall of the carriage where fibers may collect and come in contact with the paper. Repeat until no ink residue is seen on a clean swab.
  4. Reconnect power cord when finished cleaning.


Manually cleaning the ink cartridges
  1. Turn the printer on and lift the top cover.
  2. After the ink cartridges have moved to the center of the printer, unplug the power cord from the back of the printer.
  3. Remove the ink cartridges and place them wide side down on a piece of paper.
  4. Prepare a clean, foam-rubber swab or a lint-free cloth slightly dampened with water.
  5. Locate the copper-colored circuitry strip on the back of each cartridge.
  6. Clean the copper-colored strip with the dampened swab or cloth. Do not wipe the nozzle end of the cartridge or touch the nozzle plate.
  7. Clean the carriage contacts on the back wall of the ink cartridge carriage with a damp foam-rubber swab or lint-free cloth. Use a dry foam-rubber swab or a lint-free cloth to remove moisture from the contacts.

Cleaning the ink cartridges with the HP Printer Toolbox
  1. Click Start .
  2. Click Settings .
  3. Click Printers .
  4. Right-click the icon of the printer in use.
  5. Click Properties .
  6. Click the Services tab.
  7. Click Open the HP Photosmart Toolbox or Service this device.
  8. Click the Device Services tab. This tab does not display in Windows XP; proceed to the next step.
  9. Click Clean the Print Cartridges .
  10. Follow the onscreen prompts.
If you've got this far then I should tell you that these days, Printers aren't worth fixing, one just replaces them with new

Posted on Dec 17, 2007

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