Downgrading the firmware on an HP OfficeJet Pro 8620 is primarily done to bypass "non-genuine" or "older generation" cartridge errors caused by HP's Dynamic Security
Locate or Firmware Updates and turn the feature completely off. Troubleshooting Common Issues
This article provides a comprehensive guide to understanding and performing an , allowing you to bypass these restrictions and get back to printing efficiently without paying premium prices for new cartridges. Why Downgrade Your HP OfficeJet Pro 8620?
Complete Guide to HP OfficeJet Pro 8620 Go to product viewer dialog for this item. Firmware Downgrade The HP OfficeJet Pro 8620
blocks that prevent the use of non-HP or refilled ink cartridges