Locate the initialization configuration file (usually ending in .ini ).
Press the four times consecutively (even if it is unlit). The hidden Support Menu will appear on the LCD screen. Use the navigation arrows to find Reset Menu and press OK. Select Semi-Full Reset or Full Reset and confirm.
A common issue is that users might find a newer firmware file (e.g., OJ8620_1910A.exe ) on the HP website, only to find it's "Not Applicable" to their printer that is already running a different version (e.g., FDP1CN2022AR ). A full factory reset will also not restore an older firmware version; it only resets your settings to their defaults. hp officejet pro 8620 firmware downgrade
How to Downgrade HP OfficeJet Pro 8620 Firmware: A Complete Step-by-Step Guide
On the printer screen, swipe down the dashboard tab and select the icon. Scroll down and select Printer Maintenance . Tap on Update the Printer . Select Printer Update Options and choose Do Not Check . Use the navigation arrows to find Reset Menu and press OK
If the software won't let you click "Update," the utility detects that the version on your machine is newer and blocks the overwrite.
Run the firmware downgrade executable file on your computer. A full factory reset will also not restore
The Security-Functionality Paradox: A Technical Analysis of Firmware Downgrading on the HP OfficeJet Pro 8620
: You need a specific older firmware version (typically versions from 2014 to early 2016, prior to the aggressive dynamic security rollouts). The specific file format you look for will usually be an .exe file for Windows or a .dmg file for Mac. Step-by-Step Guide to Downgrading the Firmware Step 1: Prep Your Printer and Computer Turn on your HP OfficeJet Pro 8620.