The HP OfficeJet Pro 8620 is a reliable all-in-one printer often used in small offices and home workspaces. However, like many modern HP printers, firmware updates (especially those released after 2016) have introduced Dynamic Security – a feature that can reject third-party or remanufactured ink cartridges. For users who rely on affordable non-HP cartridges, a forced firmware update can suddenly render their printer unusable with those supplies.
Downgrading the firmware is a way to revert to an earlier version that does not enforce Dynamic Security as aggressively, restoring full functionality with third-party inks.
Before we dive into the technical steps, understanding the why is crucial. HP uses a security feature called Dynamic Security. This feature prevents printers from using cartridges that contain a non-HP chip.
Assumption: Target firmware file obtained and verified; printer reachable via network or USB.
HP has removed most legacy firmware files from their official support sites. You will need to find community-saved copies. The most commonly sought downgrade versions for the OJ Pro 8620 are:
Where to find them:
Critical: The firmware file must match your exact model number (not 8610, 8630, or 8640). The filename is typically something like OJ8620_1738A.exe or HP_OJ8620_FW_Update_1738A.exe.
The HP OfficeJet Pro 8620 is a reliable all-in-one printer often used in small offices and home workspaces. However, like many modern HP printers, firmware updates (especially those released after 2016) have introduced Dynamic Security – a feature that can reject third-party or remanufactured ink cartridges. For users who rely on affordable non-HP cartridges, a forced firmware update can suddenly render their printer unusable with those supplies.
Downgrading the firmware is a way to revert to an earlier version that does not enforce Dynamic Security as aggressively, restoring full functionality with third-party inks. hp officejet pro 8620 firmware downgrade
Before we dive into the technical steps, understanding the why is crucial. HP uses a security feature called Dynamic Security. This feature prevents printers from using cartridges that contain a non-HP chip. The HP OfficeJet Pro 8620 is a reliable
Assumption: Target firmware file obtained and verified; printer reachable via network or USB. Where to find them:
HP has removed most legacy firmware files from their official support sites. You will need to find community-saved copies. The most commonly sought downgrade versions for the OJ Pro 8620 are:
Where to find them:
Critical: The firmware file must match your exact model number (not 8610, 8630, or 8640). The filename is typically something like OJ8620_1738A.exe or HP_OJ8620_FW_Update_1738A.exe.
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