How to Downgrade HP OfficeJet Pro 8620 Firmware HP regularly updates its printer firmware to improve security and performance. However, these updates often activate dynamic security measures. These measures block third-party, refilled, or remanufactured ink cartridges that do not use an original HP chip. If your HP OfficeJet Pro 8620 suddenly stopped recognizing your budget-friendly ink cartridges after an automatic update, downgrading your firmware to an older version can restore your printer's compatibility with third-party ink. Risks and Warnings Before You Begin
Because downgrading carries real risks, consider these alternatives first:
Right-click the downloaded HP firmware .exe file and select .
It returns ownership control back to you, allowing you to decide what supplies go into your machine. Risks and Preparation Before You Begin hp officejet pro 8620 firmware downgrade
Once your firmware is downgraded, you must immediately disable automatic updates. If left enabled, the printer will automatically download the newest blocking firmware over Wi-Fi. Via the Printer Control Panel
Modifying your printer's firmware with third-party tools or unauthorized rollbacks will void any remaining manufacturer warranty. Step 1: Preparation and Prerequisites
If you decide to proceed, remember these golden rules: How to Downgrade HP OfficeJet Pro 8620 Firmware
The GitHub repository lists the exact firmware versions required for downgrading the OfficeJet Pro 8620: , with the corresponding filename ojpro_8620_1416A_04152014_1.ful.rfu . It is important to note that the script author explicitly states they cannot provide the firmware files themselves , as these must be obtained elsewhere. The script simply facilitates the upload process.
Before proceeding, weigh the advantages against the potential drawbacks of altering your printer's software. The Benefits
If successful, the screen will display a blue or black "Engineering" or "Service" menu. If your HP OfficeJet Pro 8620 suddenly stopped
Look for firmware version FDP1HA1416AR or older.
On the printer control panel, go to Setup > Printer Maintenance > Update the Printer > Printer Update Options . Ensure "Allow Downgrade" is set to Yes .
Watch the printer’s touchscreen display. You should see a message indicating that a firmware update or data transfer is in progress.
The utility will identify the printer, show the current (newer) version, and the version you are installing. 4. Finalizing the Downgrade