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Ladydi1987
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Hp photosmart 7520

I have a hp photosmart 7520 and I have the error 

The printhead appears to be missing, not detected , or incorrectly installed. Since I have had this I have never removed the printhead. So that's was confusing. 

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Hp photosmart 7520

@Ladydi1987

 

Welcome to HP support community.

 

Clean the printhead

  1. Open the door to access to the cartridges.

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

  3. Push the tab on a cartridge, and then pull the cartridge from its slot. Perform these steps for all the cartridges.

       CAUTION: 

    Do not leave the cartridges outside the printer longer than 30 minutes. Doing so can result in damage to both the printer and the cartridges.

    Removing a cartridge from the printhead

  4. Lift the latch handle on the carriage until it stops.

    Image: Lift  the latch handle

  5. Lift the printhead to remove it from the carriage.

       CAUTION: 

    Do not touch the copper-colored contacts. Do not let the contacts touch any surface, and be careful not to scratch the contacts while inserting the cartridges.

     

    Do not touch the electrical contacts.

    Image: Remove the  printhead

  6. Lightly dampen a clean, lint-free cloth with bottled or distilled water.

  7. Use the damp cloth to wipe the electrical contacts from the bottom to the top. Do not go past the edge between the electrical contacts and the ink nozzles. Repeat this motion until no ink appears on the cloth.

    Clean the electrical contacts

  8. Use a new, lightly dampened, lint-free cloth to wipe any accumulated ink and debris from the edge between the ink nozzles and the electrical contacts.

    Clean the edge between the ink nozzles and the electrical contacts

  9. Use a new, lightly dampened, lint-free cloth to wipe the plastic ramps on both sides of the ink nozzles. Wipe away from the nozzles only.

    Clean the ramps

  10. Dry the previously cleaned areas with a clean, dry, lint-free cloth.

  11. Use a new, lightly dampened, lint-free cloth to wipe the electrical contacts inside the printer by wiping them from top to bottom. Repeat this motion until no ink appears on the cloth.

    Clean the electrical contacts inside the printer

  12. Dry the area with a clean, dry, lint-free cloth.

  13. Lower the printhead into the carriage.

    Image: Reinstall the printhead

  14. Lower the latch handle.

    Image: Lower the latch handle

  15. Slide the cartridge into its slot, and then press down on the cartridge until it snaps into place. Repeat these steps for the remaining cartridges.

     Inserting the cartridge into place

  16. Make sure each cartridge is firmly inserted in its slot. If any are protruding, press down until the cartridge snaps into place.

  17. Close the 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.

Cheers.

Sandytechy20
I am an HP Employee

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