If your 8620 suddenly reports "Cartridge Error," "Missing or Damaged Cartridge," or "HP Chip Error" after an update, you are likely facing this issue. is the primary way to restore functionality and regain the freedom to use cheaper cartridges.
Do not touch the printer until it automatically reboots to the main home screen. Crucial Step: Disable Automatic Updates
Open a web browser (Chrome, Safari, Edge) on your computer, type the IP address into the URL bar, and press Enter.
How to downgrade your HP OfficeJet Pro 8600 Plus (N911g) to (hopefully) fix Ink System Failure error when using third party inks. hp officejet pro 8620 firmware downgrade new
HP regularly releases firmware updates that include . These updates detect non-HP chips on cartridges and disable them.
Third-party printer forums, FTP archive sites, or printer technician communities. Verify the SHA-256 checksum before use.
Understanding the Problem: Why Do Firmware Updates Break Third-Party Ink? If your 8620 suddenly reports "Cartridge Error," "Missing
Do you already have a , or are you currently relying entirely on Wi-Fi?
Most experts agree: Downgrading your own hardware’s firmware for compatibility with safe, refilled cartridges is legal and reasonable under “right to repair” principles in the EU, UK, and several US states.
Once the downgrade is successful, immediately disable auto-updates to prevent the printer from re-installing the problematic firmware: HP Printer Firmware Downgrade Guide - CompAndSave Crucial Step: Disable Automatic Updates Open a web
: Returns ownership of the hardware functionality to you, rather than letting automated cloud updates dictate your supply choices. Risks and Pre-Requisites Before You Start
Not all HP OfficeJet Pro 8620 units can be downgraded. HP has implemented restrictions in newer hardware revisions. If downgrade is not possible or fails, consider these alternatives:
On the printer screen, go to Setup > Printer Maintenance > Update the Printer > Printer Update Options > Do Not Check .
Unplugging or losing power during a flash can permanently damage the printer mainboard.
