Hp Officejet Pro 8620 Firmware Downgrade New [RECOMMENDED]

These are your only option if current firmware is ≥1743A.

To prevent the printer from automatically re-installing the problematic firmware: hp officejet pro 8620 firmware downgrade new

On the printer touchscreen:

The newest firmware updates (usually versions ending in 2145A or newer) have tightened the screws. They’ve updated the DRM database to block chips that used to work perfectly six months ago. These are your only option if current firmware is ≥1743A