Only proceed if you accept the risks. These are high-level steps — follow a trusted, model-specific guide from a reputable source; exact filenames and steps vary:

But here is the counterpoint: When you bought the HP OfficeJet Pro 8620, you paid for a physical device. HP’s firmware updates after the sale fundamentally change the functionality—specifically, blocking third-party ink that worked at the time of purchase.

HP defends its firmware updates as necessary for “ensuring print quality, preventing counterfeit cartridges, and protecting against security vulnerabilities.” Indeed, some third-party cartridges have been known to leak or cause printhead damage. However, critics argue that HP’s real motive is recurring revenue. The OfficeJet Pro 8620 was designed as a “razor-and-blades” model: sell the printer cheaply, then lock the customer into high-margin ink.

: Recent firmware versions actively block non-HP cartridges. Reverting to an older version allows the printer to recognize and use affordable, third-party, or remanufactured ink again. Cost Savings