Close
Downgrading your HP OfficeJet Pro 8620 firmware is not supported by HP, but for many users, it remains the only practical way to restore compatibility with third-party ink cartridges. The process requires careful preparation, a stable USB connection, and access to older firmware files from third-party sources.
If you are trying to resolve a software glitch without the risks of a manual downgrade, a may help: hp officejet pro 8620 firmware downgrade new
Double-click the downloaded firmware .exe and select your printer from the dropdown menu. Click Update . Downgrading your HP OfficeJet Pro 8620 firmware is
Open HP Smart > Select your printer > Go to > Navigate to Firmware Updates > Select Disable Automatic Updates or Do Not Check . but for many users
Keep perfectly good cartridges out of landfills.