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Ensure you are using a direct USB cable and that the printer is not in an error state. Try restarting both the PC and the printer.
Downgrading firmware carries a small amount of risk. If the process is interrupted, it can permanently corrupt the printer's motherboard (a state known as "bricking"). To ensure a smooth process, prepare the following items:
Disclaimer: This article is for educational purposes. Downgrading firmware may violate HP's software license agreement. Proceed at your own risk.
User reviews and expert guides for the HP OfficeJet Pro 8620 Go to product viewer dialog for this item.
Downgrading is a technical process. Follow these steps carefully to roll back your software. 8610 firmware downgrade - HP Support Community - 9174195
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This issue is caused by HP’s dynamic security firmware updates. For years, HP has pushed automated software updates that actively block aftermarket ink supplies. The most effective way to restore your printer's compatibility and save money on printing costs is to perform a firmware downgrade.
However, the enthusiast community has a proven track record of successfully rolling back the HP OfficeJet Pro 8620 to version . This specific version is widely known to accept third-party cartridges and has been the focal point of downgrade efforts since 2016.
Proceeding with a firmware downgrade is not a decision to be taken lightly. It is essential to be fully aware of the potential risks involved:
: Double-click the downloaded firmware file on your PC.
