Upload the older firmware
If you are extremely paranoid about HP sneaking an update through, assign the printer a static IP address and, in your router settings, block that IP from accessing the internet entirely. The printer will remain on your local network for printing but cannot reach HP's servers to download updates.
Press and hold the while simultaneously touching the display screen area repeatedly until a hidden menu or "Manufacturing Mode" appears.
connection between your computer and printer to prevent interruptions during the flash. Clear the Queue
During this process, the firmware updates the acceptable chip IDs on the cartridges. If you are using remanufactured, refilled, or compatible ink cartridges (which often utilize older, cloned, or reset microchips), the updated printer firmware will reject them.
I love my OfficeJet Pro 8620: fast color printing, decent scan quality, and a touchscreen that 鈥� mostly 鈥� behaves. But after a recent firmware update it started acting鈥� different. Slow wake-from-sleep, flaky AirPrint, and a new setting buried in menus that I hadn鈥檛 asked for. I tried every standard fix (reset, reinstall drivers, factory restore) before doing something a little risky: I downgraded the printer鈥檚 firmware. Here鈥檚 the story, why I did it, how I did it, and the trade-offs so you can decide if it鈥檚 worth trying.
If the standard installer refuses to run because it detects a "newer version is already installed," you must force the printer into an upload state: Turn off the printer.
