Why my deskjet 940c does not recognize my black ink cartridge?

Please help; my HP Deskjet 940c is not recognize my black ink cartridge and tried to clean the cartridge.  I have tried almost evrything but help would be very appreciated.  I am running windows XP.

There are a few steps to help solve this problem located here.

If you tried to change the cartridge and clean the contacts, then you've done several of the steps already in order to answer the question.

You can consider replacing the printer as well if the steps do not fix the issue. Have you considered the available through the Support of HPupgrade program, if the unit is out of warranty?

Tags: HP Printers

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