Before running any software, you must unlock the printer's ability to accept a rollback: On the printer control panel, go to > Tools . Navigate to Printer Maintenance or Update Printer . Look for Manage Updates . Select Allow Downgrade and set it to Yes .

This is the most common community workaround. It involves tricking the HP firmware update tool into thinking the current date is in the past, thereby unlocking the ability to reinstall older firmware (provided you have the installer file saved).

HP typically prevents downgrading to older firmware versions (anti-rollback). However, the OfficeJet Pro 8620 is a legacy device (discontinued by HP in 2022). Recently, security researchers discovered a signature bypass in the bootloader of the 8620’s specific firmware revision. This allows a manual downgrade to version 1.7.4 (the last known “open” firmware) from any newer version, including the latest 2025 release .

The HP OfficeJet Pro 8620 is a workhorse printer favored by small offices and home businesses for its efficiency and print quality. However, many users find themselves in a frustrating situation after an automatic firmware update: their printer suddenly stops recognizing third-party or refilled ink cartridges, displaying messages like "Cartridge Problem" or "Non‑HP chip detected". This comprehensive guide explains why firmware downgrade has become necessary, what the risks are, and—most importantly—how to successfully downgrade your HP OfficeJet Pro 8620 firmware using the newest available methods.

Connect the printer directly to your computer using a .

Go to Settings > Printer Maintenance > Update Printer > Printer Update Options and select Do Not Check .

"Sir, the printer is working as intended."

If you do not block future updates, your printer will automatically re-update to the latest firmware within 48 hours (HP’s new “Silent Auto-Update” policy, introduced in January 2025).

Hp Officejet Pro 8620 Firmware Downgrade New

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Hp Officejet Pro 8620 Firmware Downgrade New

Before running any software, you must unlock the printer's ability to accept a rollback: On the printer control panel, go to > Tools . Navigate to Printer Maintenance or Update Printer . Look for Manage Updates . Select Allow Downgrade and set it to Yes .

This is the most common community workaround. It involves tricking the HP firmware update tool into thinking the current date is in the past, thereby unlocking the ability to reinstall older firmware (provided you have the installer file saved).

HP typically prevents downgrading to older firmware versions (anti-rollback). However, the OfficeJet Pro 8620 is a legacy device (discontinued by HP in 2022). Recently, security researchers discovered a signature bypass in the bootloader of the 8620’s specific firmware revision. This allows a manual downgrade to version 1.7.4 (the last known “open” firmware) from any newer version, including the latest 2025 release . hp officejet pro 8620 firmware downgrade new

The HP OfficeJet Pro 8620 is a workhorse printer favored by small offices and home businesses for its efficiency and print quality. However, many users find themselves in a frustrating situation after an automatic firmware update: their printer suddenly stops recognizing third-party or refilled ink cartridges, displaying messages like "Cartridge Problem" or "Non‑HP chip detected". This comprehensive guide explains why firmware downgrade has become necessary, what the risks are, and—most importantly—how to successfully downgrade your HP OfficeJet Pro 8620 firmware using the newest available methods.

Connect the printer directly to your computer using a . Before running any software, you must unlock the

Go to Settings > Printer Maintenance > Update Printer > Printer Update Options and select Do Not Check .

"Sir, the printer is working as intended." Select Allow Downgrade and set it to Yes

If you do not block future updates, your printer will automatically re-update to the latest firmware within 48 hours (HP’s new “Silent Auto-Update” policy, introduced in January 2025).