Turn the printer on, and as soon as the HP logo appears, press the (curved arrow) four times in rapid succession. If done correctly, the Support Menu will appear.
Before you downgrade, you must stop the printer from immediately updating itself back to the latest version. hp 6950 downgrade firmware
💡 Once the downgrade is successful, keep your printer disconnected from the internet if you do not use "Scan to Email" features. This is the only 100% effective way to prevent HP from pushing silent updates in the future. Turn the printer on, and as soon as
Display "Ink Cartridge Failure" or "Cartridge Policy" messages. Turn the printer on
By rolling back the firmware, you essentially "undo" these digital locks, allowing the printer to accept a wider range of ink options. Step 1: Preparation and Prerequisites