Hello. My black printer cartridge is not working in my HP Envy 4520 printer. I’ve bought 2 new black cartridges and it’s still is not working . It keeps saying to reinstall cartridge. What to do? Thanks.
Hi @Program1 ,
welcome to the HP Support-Community.
Maybe there is just a communications problem between cartridge and printer. Please clean the electrical contacts, you'll find detailed steps at these support-document:
HP inkjet printers - Cleaning the Contacts
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