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Ink errors and "No entry" sign on HP 6950 printer

HP Officejet 6950
Microsoft Windows 10 (64-bit)

After changing an ink cartridge, it showed Low very quickly (even though it is genuine HP from Viking who is usual supplier for years. Then others said they were low, and despite changing immediately says it is low !


After changing another ink,  the printer displayed that there was a fault and no ink had been installed at all. Every ccartridge has a "No entry" sign on it in the ink display window - even though they are all present and have varying levels of ink. The printer has been switched off and back on again to no avail.


I think I had the printer about a year.

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Ink errors and "No entry" sign on HP 6950 printer



Welcome to HP support community.


Clean the electrical contacts

  1. Open the door to access to the ink cartridges.

  2. Wait until the carriage stops moving before you continue.

  3. Push the tab on the ink cartridge indicated by the error message, and then pull the ink cartridge from its slot.


    Clean the ink cartridges one at a time. Do not leave an ink cartridge outside of the printer for more than 30 minutes.

    Removing an ink cartridge from the carriage

  4. Wipe the copper-colored contact on the ink cartridge with a lint-free cloth.

    Copper-colored ink cartridge contact

  5. Place the ink cartridge to the side, with the contacts facing upwards.

  6. Wipe the contacts inside the printhead with a lint-free cloth.

    The printhead contacts

  7. Insert the ink cartridge into its slot, and then press down on the ink cartridge until it snaps into place.

  8. Repeat these steps for any other ink cartridges indicated in the error message.

  9. Close the front door and ink cartridge access door.

You can refer this HP document for more assistance:- Click here


I hope that helps.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.


I am an HP Employee

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