| Firmware Version | Release Date | Why It’s “Hot” | |----------------|--------------|----------------| | | Late 2018 | Last version before aggressive cartridge checks | | LDP_1743A | Mid 2018 | Most stable for third-party ink | | LDP_1620A | 2017 | Old but safe fallback |
: Experienced users on Reddit suggest that while the official .exe installer acts as a "gatekeeper" and blocks downgrades, you can bypass this by extracting the .FUL or .RFU binary file and sending it directly to the printer via a network command (like LPR or binary copy).
Once you have successfully downgraded, you must prevent HP from automatically updating it back to the broken version. hp officejet pro 8620 firmware downgrade hot
HP relies on a built-in architecture called . This programming actively checks the electronic chip on your ink cartridges. If the chip is recognized as an unofficial third-party component, the printer stops working instantly.
While HP officially discourages downgrading as it can "brick" the printer or remove security patches, users often follow these steps to restore third-party ink compatibility: : | Firmware Version | Release Date | Why
Since HP aggressively blocks downgrades after 2018, consider these instead:
The room grew hot, not from the radiator, but from the tension. They had to trick the printer into thinking it was traveling back in time. They initiated the , a "hot" maneuver performed while the machine was still reeling from a hard reset [1]. This programming actively checks the electronic chip on
: The remanufacturing industry is constantly adapting. Many cartridge suppliers are aware of HP's firmware updates and produce cartridges with chips that are updated to work with the latest firmware versions. Check with your cartridge supplier to see if they offer "firmware-safe" or "updated chip" versions. For example, after a problematic update, some companies confirm their cartridge compatibility with the new firmware.
: Locate the .rfu or .ful file (version 1416AR is frequently cited as a stable choice) from a third-party archive or Scribd Guide .
Look at the printer’s control panel screen. It should change to a status screen displaying words like "Updating", "Erasing", or "Programming".