Print system problem. Will not recognize pink cartridge.

[Brenda1002]

Hp OfficeJet Pro 9120r

[Kuroi_Kenshi]

Hi @Brenda1002,

Welcome to the HP Support Community!

Thanks for reaching out!

We're thrilled to have the opportunity to assist you and provide a solution.

I understand your HP OfficeJet Pro 9120r is not recognizing the pink (magenta) ink cartridge. Let’s go through a few steps to identify whether this is a cartridge, contact, or firmware-related issue.

Confirm the correct cartridge model
Verify the magenta cartridge is the exact model specified for the OfficeJet Pro 9120r.
Using a similar-looking or regional variant can cause a “not recognized” error.

Remove and reseat the magenta cartridge
Open the ink access door and remove the magenta cartridge.
Reinsert it firmly until it clicks into place.

Check for protective tape or packaging
Ensure all orange protective tape and plastic seals are fully removed.
Even a small strip left on the cartridge will prevent detection.

Inspect and clean the cartridge contacts
Remove the cartridge and gently clean the copper-colored contacts with a lint-free cloth slightly dampened with distilled water.
Let it dry completely before reinserting.

Clean the printer’s cartridge slot contacts
With the printer powered off and unplugged, gently wipe the contacts inside the magenta slot.
This clears ink residue or dust that can block communication.

Power reset the printer
With the printer ON:

Unplug the power cord from the rear

Wait 60 seconds

Plug it back in and power on
This resets cartridge detection circuitry.

Update the printer firmware
Outdated firmware can cause cartridge recognition errors.
Update the firmware using the printer menu or HP Smart, then restart the printer.

Test with another magenta cartridge
If available, install a known-good magenta cartridge.
A defective cartridge can fail even if it’s new.

I hope this helps.

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Best regards,