Question about HP OfficeJet 9120 All-In-One InkJet Printer

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HP 9120 Constantly aligning printheads

My HP 9210 is constantly aligning the printheads. Have to turn it off to make it stop. After I replaced the black ink cartridge this happened. Have never replaced the printheads. The color ink cartridges are expired, but I backdated the machine so they would be okay.

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  • Donna Lam
    Donna Lam May 15, 2009

    We've had the printer for about 4 years now but it is now and has always been rarely used because it is so incredibly slow. We were a victim of false advertising, said it would print and copy up to 22 pages per mintue color and 25 ppm b&w--in what universe that would happen, I don't know.

    So, I know you said to replace all the printheads and the expired ink. That's $300+ to do that. Do you think it would be wiser to first replace the expired ink cartridges to see if that stops the printheads from constantly aligning? Or does all of it need to happen to stop the constant aligning?




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Hi thanks for using fixya!

I recommend that you should replace the printheads to anew one. And you have replace the color ink cartridges as well. If you have used an exprired cartridges, it will result an error to your printhead. Always make sure that you always change the ink cartridges whenever it is required and if you are frequently using it heavily. Backdating the machine is helpful, however it will be more efficiently if you replace the printheads. By the way, how many years now your are using your HP printer? Did you had a chance to send it to any HP Service Center for maintenance as well? I recommend to my clients if they are heavily using or not the machine, it should be always be maintained every 6 months.

If you need further assistance, let me know.

Posted on May 15, 2009

  • Dennis Jambalos
    Dennis Jambalos May 15, 2009

    Yes, definitely, as I mentioned earlier, you shoud change your ink cartridges whenever it is required. The expired inks won't help at all. The printheads keep on aligning due to the error, as you know the printheads has its sensor, to detect whether you need to change inks or if you are using fake ink cartrdiges. If the cost of changing the printhead and the ink cartridges is not practical but instead of buying a new model of printer that suits your work.



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Follow these steps to replace the printheads in your printer.
  1. Press the Power button (c00636182.gif ) to turn on the printer.
  2. Open the top cover.
  3. Press and hold the Resume button (c01219285.bmp ) until the carriage moves to the left. CAUTION: Be careful not to proceed until the carriage is on the left side of the printer. If the carriage does not move to the left automatically, turn the printer off and back on and then try holding down the Resume button (c01219285.bmp ) again. The printhead can be damaged if the carriage is not all the way to the left for installation.
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  6. Shake the new printhead at least six times while the printhead is still in its packaging. Figure 5: Shaking the new printheadc01134519.gif
  7. Remove the new printhead from its package, and then remove its orange protective caps. Figure 6: Removing the protective capsc01134520.gif CAUTION: Do not shake the printheads after removing the orange protective caps.
  8. Insert the printhead into its color-coded slot (the label on the printhead must match the label on the printhead latch). Press down firmly on the printhead until it snaps into place. Figure 7: Inserting the new printheadc01290071.gif
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  10. Close the cover. Figure 9: Closing the coverc01290073.gif
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