Hp Officejet Pro 8620 Firmware Downgrade Better _best_ -

Cartridge still shows “Incompatible” after downgrade Solution: Some cartridges have a permanent chip lock. Buy fresh compatible cartridges from a vendor that explicitly states “No firmware update required.” We recommend LD Products or 4Inkjets.

For users who want control over their hardware, downgrading to a pre-DRM firmware is a superior option. hp officejet pro 8620 firmware downgrade better