Are you experiencing issues with your HP OfficeJet Pro 8620 printer after a recent firmware update? Perhaps you've encountered compatibility problems or prefer an earlier version of the firmware. Downgrading the firmware can be a bit tricky, but we're here to help. In this post, we'll walk you through the process of downgrading your HP OfficeJet Pro 8620 firmware.
Downgrading your firmware to an older version (such as or 1910A ) is the most effective way to restore compatibility with aftermarket ink. Below is the comprehensive guide to performing a "hot" downgrade and locking your printer against future forced updates. Prerequisites Before You Begin
If the executable refuses to flash because the current firmware is too new, you may need to boot the printer into a hidden "Manufacturing Mode" or "Support Menu" by pressing the back button four times sequentially while it powers on.
While many users seek downgrades to use cheaper third-party ink, there are also reports of the update process itself failing and causing genuine cartridges to be rejected. In these cases, performing a downgrade might resolve the issue by restoring a stable firmware state. The primary goal here is not to bypass HP's security but to fix a malfunctioning printer.
Before attempting any kind of downgrade, it's critical to understand Hewlett-Packard's official position on the matter. Their policy is very clear and has significant implications for users.
In 2016, and subsequently in later years, HP pushed a firmware update (often masked as a routine "security update") to the OfficeJet Pro 8620 and similar models. The update installed a "Dynamic Security" feature.
You are using remanufactured or compatible cartridges that worked previously but stopped after an update.
Do not attempt a firmware downgrade over Wi-Fi. A unstable network connection can ruin the installation. Connect your printer directly to your computer using a USB A-to-B cable.
