Find a secure download link for an earlier, known-good firmware version for the 8620.
Do you need help of the firmware for a particular feature?
| Error Code | Meaning | New Fix | | :--- | :--- | :--- | | | Signature check failed | The file is too new. You need an older BDL file (pre-2020). | | USB Not Recognized | Bootloader rejects FAT32 >8GB | Use a 4GB USB 2.0 drive (not USB 3.0). | | Printer ignores USB | RCM mode failed | Try sequence: Home + Cancel + Power button simultaneously. |
: This guide is provided for informational purposes only. Firmware downgrade is an unsupported procedure that may void your warranty or damage your printer. The author assumes no responsibility for any issues arising from following these instructions. Always back up your data and proceed with caution. hp officejet pro 8620 firmware downgrade new
HP does not officially support rolling back firmware. Proceed with caution, as improper installation can potentially "brick" your device. 1. Prepare Your Printer
After successful downgrade, the printer will auto-update within 24 hours if connected to the internet.
Wipe the electronic gold contacts on the third-party cartridges with a lint-free cloth and rubbing alcohol. Find a secure download link for an earlier,
These are your only option if current firmware is ≥1743A.
, ensure:
Before attempting a downgrade, you must prepare the printer to accept an older firmware version. You need an older BDL file (pre-2020)
The chip on your third-party cartridge may be physically defective or corrupted; contact your cartridge vendor for a replacement chip. Conclusion
Before you begin the downgrade process, you need to ensure a stable, uninterrupted environment. Interrupting a firmware update—even a downgrade—can "brick" (permanently disable) your printer.
On your printer's touchscreen, swipe down and tap the (gear) icon. Scroll down and select Printer Maintenance . Select Update the Printer .