: Ensure that Allow Updates is temporarily set to Yes so the printer accepts the incoming file.
Do not turn off the printer or unplug the cable during this process. The printer screen will show a progress bar or a "Verifying" message. 4. Verification Once the printer reboots: Go to Setup > Printer Information . hp officejet pro 8620 firmware downgrade
Before we dive into the technical steps, understanding the why is crucial. HP uses a security feature called . This feature prevents printers from using cartridges that contain a non-HP chip. : Ensure that Allow Updates is temporarily set
Print a configuration page: Check “Firmware Datecode” – should show the older version (e.g., 20170912 or 1829A ). HP uses a security feature called
The primary reason users seek a firmware downgrade is to bypass "Dynamic Security" measures. These updates can block the use of affordable . Reverting to an older version often restores compatibility with non-HP chips and resolves error messages like "Non-HP Chip Detected" or "Supply Memory Error". Step 1: Prepare Your Printer
If the downgrade worked, your cartridges should now be recognized. If you still see "Incompatible Cartridge," the downgrade either failed, or your printer has a hardware revision that permanently blocks the old firmware.
This article will explain exactly why you might need to downgrade, the risks involved, and a step-by-step guide to revert your 8620 to a previous, functional firmware version.