Select your HP OfficeJet Pro 8620 from the list of connected devices. Click "Update" or "Proceed."
: Interrupting a firmware flash—whether due to a power outage or pulling a cable out too early—can permanently damage the printer's mainboard.
Turning off power during a flash can corrupt the motherboard. Always ensure connections are secure.
When your HP OfficeJet Pro 8620 automatically downloads and installs the latest firmware over Wi-Fi, it instantly scans the installed cartridges. If you are using aftermarket, remanufactured, or third-party ink, the printer will lock down. You will typically see errors like: "Cartridge Problem" "One or more cartridges appear to be damaged" "Non-HP Cartridge Detected" Why a Firmware Downgrade is the Better Choice
For owners of the HP OfficeJet Pro 8620, a firmware downgrade is often the most effective solution to restore printer functionality, reduce printing costs, and regain control over hardware. While HP issues firmware updates intending to improve security and performance, recent updates have implemented aggressive "Dynamic Security" features that block third-party ink cartridges. Downgrading the firmware removes these restrictions, fixes scanning errors introduced by bad updates, and extends the productive life of the device.
This guide aims to provide a general approach to downgrading the firmware of an HP OfficeJet Pro 8620 printer. If you're unsure about any steps or encounter difficulties, consulting HP Support or a professional might be the best course of action.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
If you’re frustrated by "Cartridge Problem" messages or "Non-HP Chip" errors, you aren't alone. For many, performing an is the best way to reclaim control over their hardware. The Problem: HP’s "Dynamic Security"
"Since this update, I have been experiencing critical issues with the printer: The printer rejects official HP cartridges (HP 950/951), even though they are genuine and worked perfectly before the update."
Older firmware means missing out on actual network security patches. If your printer sits behind a secure home or office firewall, this risk is minimal.
The most severe version of this problem was observed with version FDP1CN2022AR . A request for help sent to HP Support in May 2025 illustrates the nightmare: the user reported that after the update, the printer began rejecting genuine HP 950 and 951 cartridges that worked perfectly before the update. The printer would display errors when all four cartridges were installed, but would only work if three were inserted. This is not just about blocking cheap ink; it was breaking the core functionality of the device.
Why Firmware Downgrade is Better for Your HP OfficeJet Pro 8620
If the connectivity or recognition issues coincided with a recent system update.
Select your HP OfficeJet Pro 8620 from the list of connected devices. Click "Update" or "Proceed."
: Interrupting a firmware flash—whether due to a power outage or pulling a cable out too early—can permanently damage the printer's mainboard.
Turning off power during a flash can corrupt the motherboard. Always ensure connections are secure.
When your HP OfficeJet Pro 8620 automatically downloads and installs the latest firmware over Wi-Fi, it instantly scans the installed cartridges. If you are using aftermarket, remanufactured, or third-party ink, the printer will lock down. You will typically see errors like: "Cartridge Problem" "One or more cartridges appear to be damaged" "Non-HP Cartridge Detected" Why a Firmware Downgrade is the Better Choice hp officejet pro 8620 firmware downgrade better
For owners of the HP OfficeJet Pro 8620, a firmware downgrade is often the most effective solution to restore printer functionality, reduce printing costs, and regain control over hardware. While HP issues firmware updates intending to improve security and performance, recent updates have implemented aggressive "Dynamic Security" features that block third-party ink cartridges. Downgrading the firmware removes these restrictions, fixes scanning errors introduced by bad updates, and extends the productive life of the device.
This guide aims to provide a general approach to downgrading the firmware of an HP OfficeJet Pro 8620 printer. If you're unsure about any steps or encounter difficulties, consulting HP Support or a professional might be the best course of action.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Select your HP OfficeJet Pro 8620 from the
If you’re frustrated by "Cartridge Problem" messages or "Non-HP Chip" errors, you aren't alone. For many, performing an is the best way to reclaim control over their hardware. The Problem: HP’s "Dynamic Security"
"Since this update, I have been experiencing critical issues with the printer: The printer rejects official HP cartridges (HP 950/951), even though they are genuine and worked perfectly before the update."
Older firmware means missing out on actual network security patches. If your printer sits behind a secure home or office firewall, this risk is minimal. Always ensure connections are secure
The most severe version of this problem was observed with version FDP1CN2022AR . A request for help sent to HP Support in May 2025 illustrates the nightmare: the user reported that after the update, the printer began rejecting genuine HP 950 and 951 cartridges that worked perfectly before the update. The printer would display errors when all four cartridges were installed, but would only work if three were inserted. This is not just about blocking cheap ink; it was breaking the core functionality of the device.
Why Firmware Downgrade is Better for Your HP OfficeJet Pro 8620
If the connectivity or recognition issues coincided with a recent system update.